Pub Date : 2022-11-04DOI: 10.1017/S088571562200046X
J. Kaduk, S. Gates-Rector, T. Blanton
The crystal structure of one form of halofuginone hydrobromide has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional theory techniques. Halofuginone hydrobromide crystallizes in space group P21 (#4) with a = 8.87398(13), b = 14.25711(20), c = 15.0153(3) Å, β = 91.6867(15)°, V = 1898.87(4) Å3, and Z = 4. The crystal structure consists of alternating layers (parallel to the ab-plane) of planar and nonplanar portions of the cations. N–H⋯Br and O–H⋯Br hydrogen bonds link the protonated piperidine rings and bromide anions into a two-dimensional network parallel to the ab-plane. The powder pattern has been submitted to ICDD for inclusion in the Powder Diffraction File™ (PDF®).
{"title":"Crystal structure of halofuginone hydrobromide, C16H18BrClN3O3Br","authors":"J. Kaduk, S. Gates-Rector, T. Blanton","doi":"10.1017/S088571562200046X","DOIUrl":"https://doi.org/10.1017/S088571562200046X","url":null,"abstract":"The crystal structure of one form of halofuginone hydrobromide has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional theory techniques. Halofuginone hydrobromide crystallizes in space group P21 (#4) with a = 8.87398(13), b = 14.25711(20), c = 15.0153(3) Å, β = 91.6867(15)°, V = 1898.87(4) Å3, and Z = 4. The crystal structure consists of alternating layers (parallel to the ab-plane) of planar and nonplanar portions of the cations. N–H⋯Br and O–H⋯Br hydrogen bonds link the protonated piperidine rings and bromide anions into a two-dimensional network parallel to the ab-plane. The powder pattern has been submitted to ICDD for inclusion in the Powder Diffraction File™ (PDF®).","PeriodicalId":20333,"journal":{"name":"Powder Diffraction","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41926119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-26DOI: 10.1017/S0885715622000434
Kezhou Yan, Yaru Guo, Yuanyuan Zhang, Yanxia Guo, F. Cheng
A clear understanding of the solid-state reaction of kaolinite (Kln), quartz (Qtz), and sodium carbonate (Na2CO3) is of great significance for the process optimization of coal gangue calcined with Na2CO3. In this work, a comparative study of the isothermal solid-state reaction systems of Kln–Na2CO3 and Kln–Qtz–Na2CO3 was performed by means of X-ray diffraction (XRD), scanning electron microscope, and energy dispersion spectroscopy (SEM-EDS). The results showed that the calcined products both for these reaction systems mainly contain different kinds of sodium aluminum silicates (e.g., NaAlSiO4, Na1.55Al1.55Si0.45O4, and Na1.95Al1.95Si0.05O4) and various kinds of sodium silicates (e.g., Na2Si3O7, Na2SiO3, and Na6Si2O7). The mass percentage of Na2CO3 played a key role in the phase transformation, determining the Na/Al/Si molar ratio of the formed sodium aluminum silicates. Compared with the reaction system of Kln–Na2CO3, the existence of Qtz inhibited the formation of sodium aluminum silicates in the reaction system of Kln–Qtz–Na2CO3. It should be noted that the formed phases both for these reaction systems were slightly different from that of the thermodynamical calculated results of Na2O–SiO2–Al2O3 using FactSage™ software. According to both the experimental and calculated results, a reasonable batching area for coal gangue activation was proposed that the addition of Na2CO3 should be in the range of 20–50% of the total mass of Kln, Qtz, and Na2CO3.
{"title":"Comparative study of the isothermal solid-state reaction systems of kaolinite–Na2CO3 and kaolinite–quartz–Na2CO3 for coal gangue activation","authors":"Kezhou Yan, Yaru Guo, Yuanyuan Zhang, Yanxia Guo, F. Cheng","doi":"10.1017/S0885715622000434","DOIUrl":"https://doi.org/10.1017/S0885715622000434","url":null,"abstract":"A clear understanding of the solid-state reaction of kaolinite (Kln), quartz (Qtz), and sodium carbonate (Na2CO3) is of great significance for the process optimization of coal gangue calcined with Na2CO3. In this work, a comparative study of the isothermal solid-state reaction systems of Kln–Na2CO3 and Kln–Qtz–Na2CO3 was performed by means of X-ray diffraction (XRD), scanning electron microscope, and energy dispersion spectroscopy (SEM-EDS). The results showed that the calcined products both for these reaction systems mainly contain different kinds of sodium aluminum silicates (e.g., NaAlSiO4, Na1.55Al1.55Si0.45O4, and Na1.95Al1.95Si0.05O4) and various kinds of sodium silicates (e.g., Na2Si3O7, Na2SiO3, and Na6Si2O7). The mass percentage of Na2CO3 played a key role in the phase transformation, determining the Na/Al/Si molar ratio of the formed sodium aluminum silicates. Compared with the reaction system of Kln–Na2CO3, the existence of Qtz inhibited the formation of sodium aluminum silicates in the reaction system of Kln–Qtz–Na2CO3. It should be noted that the formed phases both for these reaction systems were slightly different from that of the thermodynamical calculated results of Na2O–SiO2–Al2O3 using FactSage™ software. According to both the experimental and calculated results, a reasonable batching area for coal gangue activation was proposed that the addition of Na2CO3 should be in the range of 20–50% of the total mass of Kln, Qtz, and Na2CO3.","PeriodicalId":20333,"journal":{"name":"Powder Diffraction","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47172257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-03DOI: 10.1017/S0885715622000409
J. Kaduk, S. Gates-Rector, T. Blanton
The crystal structure of ponazuril has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional theory techniques. Ponazuril crystallizes in space group P21/c (#14) with a = 8.49511(6), b = 12.38696(6), c = 18.84239(17) Å, β = 96.7166(4)°, V = 1969.152(12) Å3, and Z = 4. N–H⋯O hydrogen bonds link the molecules into chains along the a-axis, with a graph set C1,1(6). The powder pattern has been submitted to ICDD for inclusion in the Powder Diffraction File™ (PDF®).
利用同步加速器x射线粉末衍射数据对ponazuril的晶体结构进行了求解和细化，并利用密度泛函理论技术对其进行了优化。Ponazuril在P21/c(#14)空间群中结晶，a = 8.49511(6)， b = 12.38696(6)， c = 18.84239(17) Å， β = 96.7166(4)°，V = 1969.152(12) Å3, Z = 4。N-H⋯O氢键沿a轴将分子连接成链，图集C1,1(6)。粉末图案已提交给ICDD，纳入粉末衍射文件™(PDF®)。
{"title":"Crystal structure of ponazuril, C18H14F3N3O6S","authors":"J. Kaduk, S. Gates-Rector, T. Blanton","doi":"10.1017/S0885715622000409","DOIUrl":"https://doi.org/10.1017/S0885715622000409","url":null,"abstract":"The crystal structure of ponazuril has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional theory techniques. Ponazuril crystallizes in space group P21/c (#14) with a = 8.49511(6), b = 12.38696(6), c = 18.84239(17) Å, β = 96.7166(4)°, V = 1969.152(12) Å3, and Z = 4. N–H⋯O hydrogen bonds link the molecules into chains along the a-axis, with a graph set C1,1(6). The powder pattern has been submitted to ICDD for inclusion in the Powder Diffraction File™ (PDF®).","PeriodicalId":20333,"journal":{"name":"Powder Diffraction","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57032058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-03DOI: 10.1017/S0885715622000422
J. Kaduk, S. Gates-Rector, T. Blanton
The crystal structure of haloxon has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional theory techniques. Haloxon crystallizes in space group P21/n (#14) with a = 19.60382(6), b = 10.05473(3), c = 8.73591(2) Å, β = 92.6617(2)°, V = 1720.088(11) Å3, and Z = 4. The structure consists of discrete molecules. The mean planes of the fused ring systems are approximately 0–11 and 011. The rings form staggered stacks perpendicular to these planes. There are no traditional hydrogen bonds in the structure, but several C–H⋯O and C–H⋯Cl hydrogen bonds contribute to the crystal energy. The powder pattern has been submitted to ICDD for inclusion in the Powder Diffraction File™ (PDF®).
{"title":"Crystal structure of haloxon, C14H14Cl3O6P","authors":"J. Kaduk, S. Gates-Rector, T. Blanton","doi":"10.1017/S0885715622000422","DOIUrl":"https://doi.org/10.1017/S0885715622000422","url":null,"abstract":"The crystal structure of haloxon has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional theory techniques. Haloxon crystallizes in space group P21/n (#14) with a = 19.60382(6), b = 10.05473(3), c = 8.73591(2) Å, β = 92.6617(2)°, V = 1720.088(11) Å3, and Z = 4. The structure consists of discrete molecules. The mean planes of the fused ring systems are approximately 0–11 and 011. The rings form staggered stacks perpendicular to these planes. There are no traditional hydrogen bonds in the structure, but several C–H⋯O and C–H⋯Cl hydrogen bonds contribute to the crystal energy. The powder pattern has been submitted to ICDD for inclusion in the Powder Diffraction File™ (PDF®).","PeriodicalId":20333,"journal":{"name":"Powder Diffraction","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49559596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-03DOI: 10.1017/S0885715622000410
J. Kaduk, S. Gates-Rector, T. Blanton
The crystal structure of diclazuril has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional theory techniques. Diclazuril crystallizes in space group P21/a (#14) with a = 27.02080(18), b = 11.42308(8), c = 5.36978(5) Å, β = 91.7912(7)°, V = 1656.629(15) Å3, and Z = 4. The crystal structure consists of layers of molecules parallel to the ac-plane. A strong N–H⋯O hydrogen bond links the molecules into dimers along the a-axis with a graph set R2,2(8). The powder pattern has been submitted to ICDD for inclusion in the Powder Diffraction File™ (PDF®).
{"title":"Crystal structure of diclazuril, C17H9Cl3N4O2","authors":"J. Kaduk, S. Gates-Rector, T. Blanton","doi":"10.1017/S0885715622000410","DOIUrl":"https://doi.org/10.1017/S0885715622000410","url":null,"abstract":"The crystal structure of diclazuril has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional theory techniques. Diclazuril crystallizes in space group P21/a (#14) with a = 27.02080(18), b = 11.42308(8), c = 5.36978(5) Å, β = 91.7912(7)°, V = 1656.629(15) Å3, and Z = 4. The crystal structure consists of layers of molecules parallel to the ac-plane. A strong N–H⋯O hydrogen bond links the molecules into dimers along the a-axis with a graph set R2,2(8). The powder pattern has been submitted to ICDD for inclusion in the Powder Diffraction File™ (PDF®).","PeriodicalId":20333,"journal":{"name":"Powder Diffraction","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42441835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-03DOI: 10.1017/S0885715622000392
J. Kaduk, A. Gindhart, S. Gates-Rector, T. Blanton
The crystal structure of imepitoin has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional techniques. Imepitoin crystallizes in space group Pbca (#61) with a = 12.35541(2), b = 28.43308(8), c = 7.340917(7) Å, V = 2578.882(7) Å3, and Z = 8. The roughly planar molecules stack along the c-axis. There are no traditional hydrogen bonds in the structure, but several intramolecular and intermolecular C–H⋯O, C–H⋯N, and C–H⋯Cl hydrogen bonds contribute to the crystal energy. The powder pattern has been submitted to ICDD for inclusion in the Powder Diffraction File™ (PDF®).
利用同步加速器x射线粉末衍射数据对伊美美托因的晶体结构进行了解析和细化，并利用密度泛函技术对其进行了优化。Imepitoin在Pbca(#61)空间群中结晶，a = 12.35541(2)， b = 28.43308(8)， c = 7.340917(7) Å， V = 2578.882(7) Å3, Z = 8。大致平面的分子沿着c轴堆叠。该结构中没有传统的氢键，但分子内和分子间的几个C-H⋯O、C-H⋯N和C-H⋯Cl氢键贡献了晶体能量。粉末图案已提交给ICDD，纳入粉末衍射文件™(PDF®)。
{"title":"Crystal structure of imepitoin, C13H14ClN3O2","authors":"J. Kaduk, A. Gindhart, S. Gates-Rector, T. Blanton","doi":"10.1017/S0885715622000392","DOIUrl":"https://doi.org/10.1017/S0885715622000392","url":null,"abstract":"The crystal structure of imepitoin has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional techniques. Imepitoin crystallizes in space group Pbca (#61) with a = 12.35541(2), b = 28.43308(8), c = 7.340917(7) Å, V = 2578.882(7) Å3, and Z = 8. The roughly planar molecules stack along the c-axis. There are no traditional hydrogen bonds in the structure, but several intramolecular and intermolecular C–H⋯O, C–H⋯N, and C–H⋯Cl hydrogen bonds contribute to the crystal energy. The powder pattern has been submitted to ICDD for inclusion in the Powder Diffraction File™ (PDF®).","PeriodicalId":20333,"journal":{"name":"Powder Diffraction","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45060578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-13DOI: 10.1017/S0885715622000380
Analio Dugarte-Dugarte, R. Toro, J. van de Streek, J. Henao, G. C. Diaz de Delgado, J. M. Delgado
The previously unreported crystal structure of (S)-Dapoxetine hydrochloride (DAPHCl), the only active pharmaceutical ingredient specially developed for the treatment of premature ejaculation in men, has been determined from laboratory X-ray powder diffraction data with DASH and refined by the Rietveld method with TOPAS-Academic. The structure was evaluated and optimized by dispersion-corrected DFT calculations. This compound crystallizes in an orthorhombic cell, space group P212121, with unit-cell parameters a= 6.3208(3) Å, b = 10.6681(5) Å, c = 28.1754(10) Å, V = 1899.89(14) Å3, Z = 4. The refinement converged to Rp = 0.0442, Rwp = 0.0577, and GoF = 2.440. The crystal structure is a complex 3D arrangement of DAPHCl moieties held together by hydrogen bonds, π⋯π, and C–H⋯π interactions. The chloride ions form layers parallel to the ab plane and are connected by dapoxetinium moieties through N–H⋯Cl and C–H⋯Cl hydrogen bonds. These layers stack along the c-axis, which are connected by C–H⋯π interactions. Hirshfeld surface analysis and fingerprint plot calculations have been performed.
{"title":"Crystal structure from laboratory X-ray powder diffraction data, DFT-D calculations, and Hirshfeld surface analysis of (S)-dapoxetine hydrochloride","authors":"Analio Dugarte-Dugarte, R. Toro, J. van de Streek, J. Henao, G. C. Diaz de Delgado, J. M. Delgado","doi":"10.1017/S0885715622000380","DOIUrl":"https://doi.org/10.1017/S0885715622000380","url":null,"abstract":"The previously unreported crystal structure of (S)-Dapoxetine hydrochloride (DAPHCl), the only active pharmaceutical ingredient specially developed for the treatment of premature ejaculation in men, has been determined from laboratory X-ray powder diffraction data with DASH and refined by the Rietveld method with TOPAS-Academic. The structure was evaluated and optimized by dispersion-corrected DFT calculations. This compound crystallizes in an orthorhombic cell, space group P212121, with unit-cell parameters a= 6.3208(3) Å, b = 10.6681(5) Å, c = 28.1754(10) Å, V = 1899.89(14) Å3, Z = 4. The refinement converged to Rp = 0.0442, Rwp = 0.0577, and GoF = 2.440. The crystal structure is a complex 3D arrangement of DAPHCl moieties held together by hydrogen bonds, π⋯π, and C–H⋯π interactions. The chloride ions form layers parallel to the ab plane and are connected by dapoxetinium moieties through N–H⋯Cl and C–H⋯Cl hydrogen bonds. These layers stack along the c-axis, which are connected by C–H⋯π interactions. Hirshfeld surface analysis and fingerprint plot calculations have been performed.","PeriodicalId":20333,"journal":{"name":"Powder Diffraction","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41756134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-09DOI: 10.1017/S0885715622000343
J. Kaduk, A. Gindhart, S. Gates-Rector, T. Blanton
The crystal structure of aminopentamide hydrogen sulfate has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional techniques. Aminopentamide hydrogen sulfate crystallizes in space group P21/c (#14) with a = 17.62255(14), b = 6.35534(4), c = 17.82499(10) Å, β = 96.4005(6)°, V = 1983.906(14) Å3, and Z = 4. The structure consists of layers parallel to the bc-plane with hydrogen sulfate anions at the core and aminopentamide cations on the outside. There is a strong charge-assisted O49–H53⋯O52 hydrogen bond between the hydrogen sulfate anions. This hydrogen bond links the anions in a chain parallel to the b-axis. The cation forms a discrete N–H⋯O hydrogen bond to the anion. The amide group also forms two weaker discrete hydrogen bonds to the anion. The three N–H⋯O hydrogen bonds link the cations and anions into columns parallel to the b-axis. This commercial material from USP contained an unidentified impurity, the powder pattern of which could be indexed on a monoclinic unit cell. The powder pattern has been submitted to ICDD for inclusion in the Powder Diffraction File™ (PDF®).
{"title":"Crystal structure of aminopentamide hydrogen sulfate, (C19H25N2O)(HSO4)","authors":"J. Kaduk, A. Gindhart, S. Gates-Rector, T. Blanton","doi":"10.1017/S0885715622000343","DOIUrl":"https://doi.org/10.1017/S0885715622000343","url":null,"abstract":"The crystal structure of aminopentamide hydrogen sulfate has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional techniques. Aminopentamide hydrogen sulfate crystallizes in space group P21/c (#14) with a = 17.62255(14), b = 6.35534(4), c = 17.82499(10) Å, β = 96.4005(6)°, V = 1983.906(14) Å3, and Z = 4. The structure consists of layers parallel to the bc-plane with hydrogen sulfate anions at the core and aminopentamide cations on the outside. There is a strong charge-assisted O49–H53⋯O52 hydrogen bond between the hydrogen sulfate anions. This hydrogen bond links the anions in a chain parallel to the b-axis. The cation forms a discrete N–H⋯O hydrogen bond to the anion. The amide group also forms two weaker discrete hydrogen bonds to the anion. The three N–H⋯O hydrogen bonds link the cations and anions into columns parallel to the b-axis. This commercial material from USP contained an unidentified impurity, the powder pattern of which could be indexed on a monoclinic unit cell. The powder pattern has been submitted to ICDD for inclusion in the Powder Diffraction File™ (PDF®).","PeriodicalId":20333,"journal":{"name":"Powder Diffraction","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42555122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-01DOI: 10.1017/S0885715622000276
S. Bourne
The first Pan-African Conference on Crystallography, PCCr1, was held in Dschang, Cameroon in 2016. This highly successful meeting attracted 192 participants from 32 countries, including 20 African countries. PCCr2 followed in 2019, with over 200 participants from 35 countries. This was a joint meeting with AfLS and was hosted in Accra, Ghana. PPCCr3 was scheduled to take place in Nairobi, Kenya in 2021. Unfortunately, due to the pandemic, this meeting had to be postponed. The Steering Committee of the African Crystallographic Association, along with the Local Organizing Committee of PCCr3, decided to hold an online meeting in order to continue the momentum and sense of community generated during the first two PCCr meetings. ePCCr was, therefore, organized.
{"title":"ePCCr: an online conference organized jointly with the African Light Source and the African Physical Society","authors":"S. Bourne","doi":"10.1017/S0885715622000276","DOIUrl":"https://doi.org/10.1017/S0885715622000276","url":null,"abstract":"The first Pan-African Conference on Crystallography, PCCr1, was held in Dschang, Cameroon in 2016. This highly successful meeting attracted 192 participants from 32 countries, including 20 African countries. PCCr2 followed in 2019, with over 200 participants from 35 countries. This was a joint meeting with AfLS and was hosted in Accra, Ghana. PPCCr3 was scheduled to take place in Nairobi, Kenya in 2021. Unfortunately, due to the pandemic, this meeting had to be postponed. The Steering Committee of the African Crystallographic Association, along with the Local Organizing Committee of PCCr3, decided to hold an online meeting in order to continue the momentum and sense of community generated during the first two PCCr meetings. ePCCr was, therefore, organized.","PeriodicalId":20333,"journal":{"name":"Powder Diffraction","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41879536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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