陨石塔顿盐--自然激发的彗星和小行星铵库

Sergey N. Britvin, Oleg S. Vereshchagin, Natalia S. Vlasenko, Maria G. Krzhizhanovskaya, Marina A. Ivanova
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引用次数: 0

摘要

由于缺乏太阳系中真正的矿物--原生铵载体的基准数据,人们对地外铵库的看法存在争议。我们在本文中报告了首个陨石铵矿物载体的发现,并展示了它与彗星和小行星体的成分和光谱特征的相关性。镍钴陨石((NH4)2(Mg,Ni)(SO4)2 6H2O)出现在与C型小行星龙宫(162173)和贝努(101955)密切相关的原始碳质软玉中。现有的光谱、化学和矿物学数据表明,天然 Tutton 盐完全符合彗核和碳质小行星条件下的铵储库作用。
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Meteoritic Tutton salt, a naturally inspired reservoir of cometary and asteroidal ammonium
The lack of benchmark data on the real minerals, native ammonium carriers in Solar System gives rise to controversial opinions on extraterrestrial ammonium reservoirs. We herein report on discovery of the first mineral carrier of meteoritic ammonium and show its relevance to the compositional and spectral characteristics of cometary and asteroidal bodies. Chemically distant from previously inferred volatile organics or ammoniated phyllosilicates, it is an aqueous metal-ammonium sulfate related to a family of so-called Tutton salts. Nickeloan boussingaultite, (NH4)2(Mg,Ni)(SO4)2 6H2O, occurs in Orgueil, a primitive carbonaceous chondrite closely related to (162173) Ryugu and (101955) Bennu, the C-type asteroids. The available spectroscopic, chemical and mineralogical data signify that natural Tutton salts perfectly fit into the role of ammonium reservoir under conditions of cometary nuclei and carbonaceous asteroids.
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