Ktenasite from the Hirao mine at Minoo, Osaka, Japan
Ktenasite from the Hirao mine at Minoo, Osaka, Japan
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来自日本大阪箕面平尾矿的硅锰矿
DOI：
10.2465/jmps.97.185
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
I. Kusachi
中科院分区：
文献类型：
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作者：
M. Ohnishi;S. Kobayashi;I. Kusachi
日本大阪箕面平尾矿山侏罗纪丹波地区蚀变页岩中发现了钾长石，是一种矿脉形成矿物。在主岩闪锌矿的边缘部分也发现了这种矿物。这是日本首次出现钾长石。钾长石以扁平棱柱状晶体的聚集体形式出现，长可达 0.5 毫米，宽可达 0.1 毫米，与黄铜矿、蛇绿石、菱锌矿、水锌矿和褐铁矿等矿物伴生。 EPMA和CHNS/O分析仪在O = 20的基础上给出了经验公式（Cu3.446Zn1.451Co0.080Pb0.018Ni0.007）Σ5.002（SO4）2.003（OH）5.998·5.99H2O。晶胞参数为a = 5.590（1），b = 6.161（1）， c = 23.741(3) A，β = 95.628(3)°。维氏显微硬度为113kg/mm2，莫氏硬度为2.5。密度为2.93g/cm3。箕面的钾长石很可能是由含铜流体与闪锌矿反应形成的。
Ktenasite was found as a vein forming mineral in the altered shale of Tamba zone of Jurassic age, at the Hirao mine, Minoo, Osaka, Japan. The mineral was also found in a marginal part of sphalerite in the host rock. This is the first occurrence of ktenasite in Japan. Ktenasite occurred as aggregates of flattened prismatic crystals up to 0.5 mm long and 0.1 mm wide, in association with minerals such as chalcopyrite, serpierite, smithsonite, hydrozincite, and limonite. An EPMA and CHNS/O analyzer gave the empirical formula (Cu3.446Zn1.451Co0.080Pb0.018Ni0.007)Σ5.002(SO4)2.003(OH)5.998·5.99H2O on the basis of O = 20. The unit cell parameters were a = 5.590(1), b = 6.161(1), c = 23.741(3) A, and β = 95.628(3)°. The Vickers microhardness was 113 kg/mm2 and Moh's hardness was 2.5. The density was 2.93 g/cm3. It is likely that ktenasite at Minoo was formed by a reaction of the Cu-bearing fluids with sphalerite.