萤石-(Nd), Ca2Nd3(SiO4)3F,稀土矽卡岩中一种新的关键固钕矿物

IF 2.8 3区 地球科学 Q2 MINERALOGY Mineralogical Magazine Pub Date : 2023-06-08 DOI:10.1180/mgm.2023.45
D. Holtstam, Patrick Casey, L. Bindi, H. Förster, A. Karlsson, Oona Appelt
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引用次数: 1

摘要

萤石-(Nd),理想情况下为Ca 2 Nd 3(SiO 4)3F,是一种经批准的矿物(IMA 2023-001),构成磷灰石超群中萤石组的新成员。它存在于Västmanland(瑞典Bastnäs型矿床之一)Norberg的Malmkärra铁矿的矽卡岩中,与方解石、白云石、磁铁矿、锂辉石、滑石、萤石、重晶石、白钨矿、钆石-(Nd)和其他REE矿物有关。萤石-(Nd)形成反角体和小晶粒,直径很少达到250µm。它们呈棕粉色,透明,有玻璃质到油腻的光泽。该矿物很脆,具有不均匀或亚选择性断裂,并且缺乏解理。在薄剖面中,该矿物为非低温、单轴(-)矿物。D计算值=4.92(1)g·cm−3
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Fluorbritholite-(Nd), Ca2Nd3(SiO4)3F, a new and a key mineral for neodymium sequestration in REE skarns
Fluorbritholite-(Nd), ideally Ca 2 Nd 3 (SiO 4 ) 3 F, is an approved mineral (IMA 2023-001) and constitutes a new member of the britholite group of the apatite supergroup. It occurs in skarn from the Malmkärra iron mine, Norberg, Västmanland (one of the Bastnäs-type deposits in Sweden), associated with calcite, dolomite, magnetite, lizardite, talc, fluorite, baryte, scheelite, gadolinite-(Nd) and other REE minerals. Fluorbritholite-(Nd) forms anhedral and small grains, rarely up to 250 µm across. They are brownish pink, transparent with a vitreous to greasy luster. The mineral is brittle, with an uneven or subconchoidal fracture, and lacks a cleavage. In thin section, the mineral is nonpleochroic, uniaxial (-). D calc = 4.92(1) g·cm − 3 and
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来源期刊
Mineralogical Magazine
Mineralogical Magazine 地学-矿物学
CiteScore
4.00
自引率
25.90%
发文量
104
审稿时长
6-12 weeks
期刊介绍: Mineralogical Magazine is an international journal of mineral sciences which covers the fields of mineralogy, crystallography, geochemistry, petrology, environmental geology and economic geology. The journal has been published continuously since the founding of the Mineralogical Society of Great Britain and Ireland in 1876 and is a leading journal in its field.
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