Müllerite，来自美国加利福尼亚州奥托山的铁类似物

IF 1.1 4区地球科学 Q3 MINERALOGY

Canadian Mineralogist Pub Date : 2020-07-01 DOI:10.3749/canmin.2000026

S. Mills, A. Kampf, K. Momma, R. Housley, J. Marty

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引用次数: 0

摘要

Müllerite（IMA2019–060）是在美国加利福尼亚州圣贝纳迪诺县贝克西北2.5公里的奥托山的几个工作区发现的一种新矿物。Mülerite以直径达0.2毫米的六边形平板和薄板、共生球状星团和散射薄片的形式出现。晶体呈黄色，呈红橙色，有淡黄色条纹和亚大马士革至油腻的光泽。晶体很脆，有不规则的断裂，硬度为～2，在{001}上有完美的解理。观察到的主要形式是{100}和{001}。计算出的密度为5.812 g/cm3。经验公式（基于7O+Cl+I apfu）为Pb1.83Ag0.26Fe0.93Al0.03Cu0.02Te6+0.95O5.56Cl1.3OI0.14；端基分子式为Pb2Fe3+（Te6+O6）Cl。Müllerite是三角的，空间群P312，晶胞参数a=5.2040（5），c=8.9654（12）Å，V=210.23（3）Å3，Z=1。利用Rietveld分析对穆勒石的晶体结构进行了细化，其晶体结构收敛为Rwp=4.861%，S=0.1873，RB=1.800%，RF=0.691%。

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Müllerite, the Fe-analogue of backite from Otto Mountain, California, USA

Müllerite (IMA2019–060) is a new mineral found at several workings on Otto Mountain, 2.5 km NW of Baker, San Bernardino County, California, USA. Müllerite occurs as hexagonal tablets and thin plates up to 0.2 mm across, intergrown ball-like clusters, and scattered flakes. Crystals are yellow, tending to reddish-orange, and have a pale-yellow streak and subadamantine to greasy luster. Crystals are brittle with an irregular fracture and have a hardness of ∼2 and perfect cleavage on {001}. The main forms observed are {100} and {001}. The calculated density is 5.812 g/cm3. The empirical formula (based on 7 O + Cl + I apfu) is Pb1.83Ag0.26Fe0.93Al0.03Cu0.02Te6+0.95O5.56Cl1.30I0.14; the endmember formula is Pb2Fe3+(Te6+O6)Cl. Müllerite is trigonal, space group P312, with the unit cell parameters a = 5.2040(5), c = 8.9654(12) Å, V = 210.23(3) Å3, and Z = 1. The crystal structure of müllerite was refined using Rietveld analysis and converged to Rwp = 4.861%, S = 0.1873, RB = 1.800%, and RF = 0.691%. Müllerite is the Fe-analogue of backite, Pb2Al3+(Te6+O6)Cl.

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来源期刊

Canadian Mineralogist 地学-矿物学

CiteScore

2.20

自引率

22.20%

发文量

审稿时长

4-8 weeks

期刊介绍： Since 1962, The Canadian Mineralogist has published papers dealing with all aspects of mineralogy, crystallography, petrology, economic geology, geochemistry, and applied mineralogy.