Hollisterite (Al3Fe), kryachkoite (Al, Cu)6(Fe, Cu), and stolperite (AlCu): Three new minerals from the Khatyrka CV3 carbonaceous chondrite
Hollisterite (Al3Fe), kryachkoite (Al, Cu)6(Fe, Cu), and stolperite (AlCu): Three new minerals from the Khatyrka CV3 carbonaceous chondrite
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DOI：
10.2138/am-2017-5991
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发表时间：
2017-03-01
影响因子：
3.1
通讯作者：
Steinhardt, Paul J.
中科院分区：
文献类型：
--
作者：
Ma, Chi;Lin, Chaney;Steinhardt, Paul J.
我们对Khatyrka CV 3碳质球粒陨石的纳米矿物学研究揭示了三种新的合金矿物--硬硅钙石（IMA 2016-034; Al 3Fe），kryachkoite [IMA 2016-062;（Al，Cu）（6）（Fe，Cu）]和stolperite（IMA 2016-033; AlCu）--在USNM 7908的第126 A节中。钙铝榴石仅以与钙铝榴石、二十碳六水硅钙石和钙铝榴石的一种晶体存在，显示出经验式Al2.89Fe0.77Cu0.32Si0.02和单斜C2/m结构，其中a = 15.60埃，B = 7.94埃，c = 12.51埃，β = 108.1度，V = 1472.9埃（3），Z = 24。硅钾铁矾与卡梯石和铝一起出现，其经验式为Al5.45Cu0.97Fe0.55Cr0.02Si0.01，斜方晶系Cmc 21结构，a = 7.460埃，B = 6.434埃，c = 8.777度，V = 421.3埃（3），Z = 4。钾长石出现在卡梯里石中，或沿着与二十面辉石和/或钙铝榴石和卡梯里石一起出现，具有Al1.15Cu0.81Fe0.04的经验式和立方Pm 3 m结构，其中a = 2.9埃，V = 24.4埃（3），Z = 1。这三种新矿物的具体特征及其与陨石基质材料的关系，为Khatyrka陨石中Al-Cu-Fe金属相的外星起源提供了重要的新证据。Hollisterite是为了荣誉林肯S.普林斯顿大学的霍利斯特对地球科学的杰出贡献。Kryachkoite是为了荣誉Valery Kryachko而命名的，他在1979年发现了Khatyrka陨石的原始样本。Stolperite是为了荣誉Edward M.加州理工学院的Stolper对岩石学和陨石研究的重要贡献。
Our nanomineralogy investigation of the Khatyrka CV3 carbonaceous chondrite has revealed three new alloy minerals-hollisterite (IMA 2016-034; Al3Fe), kryachkoite [IMA 2016-062; (Al, Cu)(6)(Fe, Cu)], and stolperite (IMA 2016-033; AlCu)-in section 126A of USNM 7908. Hollisterite occurs only as one crystal with stolperite, icosahedrite, and khatyrkite, showing an empirical formula of Al2.89Fe0.77Cu0.32Si0.02 and a monoclinic C2/m structure with a = 15.60 angstrom, b = 7.94 angstrom, c = 12.51 angstrom, beta = 108.1 degrees, V = 1472.9 angstrom(3), Z = 24. Kryachkoite occurs with khatyrkite and aluminum, having an empirical formula of Al5.45Cu0.97Fe0.55Cr0.02Si0.01 and an orthorhombic Cmc21 structure with a = 7.460 angstrom, b = 6.434 angstrom, c = 8.777 degrees, V = 421.3 angstrom(3), Z = 4. Stolperite occurs within khatyrkite, or along with icosahedrite and/or hollisterite and khatyrkite, having an empirical formula of Al1.15Cu0.81Fe0.04 and a cubic Pm3m structure with a = 2.9 angstrom, V = 24.4 angstrom(3), Z = 1. Specific features of the three new minerals, and their relationships with the meteorite matrix material, add significant new evidence for the extraterrestrial origin of the Al-Cu-Fe metal phases in the Khatyrka meteorite. Hollisterite is named in honor of Lincoln S. Hollister at Princeton University for his extraordinary contributions to earth science. Kryachkoite is named in honor of Valery Kryachko who discovered the original samples of the Khatyrka meteorite in 1979. Stolperite is named in honor of Edward M. Stolper at California Institute of Technology for his fundamental contributions to petrology and meteorite research.