Hennomartinite and kornite, two new Mn3+ rich silicates from the Wessels Mine, Kalahari, South Africa
Hennomartinite and kornite, two new Mn3+ rich silicates from the Wessels Mine, Kalahari, South Africa
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Hennommartinite 和 kornite，两种新的富含 Mn3 的硅酸盐，产自南非卡拉哈里韦塞尔斯矿
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
R. Dixon
中科院分区：
文献类型：
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作者：
T. Armbruster;R. Oberhänsli;V. Bermanec;R. Dixon
钙镁锰矿，SrMn 23 + [Si 2 O 7 ]（OH）2 . H2O为正交晶系（Cmcm，a = 6，245 [1]，B = 9.031[2]）. c = 13，404 [2] A，V = 756.0[1] A 3，Z = 4）硬铝石结构类型的二硅酸盐，以可达1 mm的他形多面体存在，与苏硅铝石和绢云母-针梳岩强烈共生。该矿物在薄片上是半透明的，从黄棕色到暗红棕色的多时性，折射率大于1.82。计算的密度为3.68 g/cm 3。通过电子探针分析和红外光谱法确定了化学组成。Mn的三价特征来自化学计量和从晶体结构分析获得的键长
Hennomartinite, SrMn 2 3+ [Si 2 O 7 ](OH) 2 . H 2 O, is an orthorhombic (Cmcm, a = 6,245[1], b = 9.031[2]. c = 13,404[2] A, V = 756.0[1] A 3 , Z = 4) disilicate of the lawsonite structure type which occurs as anhedral poikiloblasts up to 1 mm, strongly intergrown with sugilite and serandite-pectolite. The mineral is translucent in thin section, pleochronic from yellowish brown to dark red-brown and has indices of refraction greater than 1,82. The calculated density is 3.68 g/cm 3 . The chemical composition was determined by electron microprobe analyses and IR-spectroscopy. The trivalent character of Mn is derived from stoichiometry and bond lengths obtained from a crystal structure analysis