China Business Newsweekly
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Mineral Science
Research from Y. Banno et al broadens understanding of mineral science
February 9th, 2010
According to recent research from Tsukuba, Japan, "Potassic-ferropargasite, ideally KCa2(Fe42+Al)Si6Al2O22(OH)(2), is a new member of the amphibole group occurring in a schistose calcareous hornfels from Kabutoichiba, Kameyama, Mie Prefecture, central Japan. The amphibole Occurs as black subhedral to anhedral crystals, up to about 700 pin long, associated with calcite, biotite, K-feldspar. plagioclase, scapolite, chlorite and titanite." "Potassic-ferropargasite is optically biaxial negative with alpha = 1.680(2), beta = 1.690 (calc.), gamma = 1.698(2) and 2V= 80-90 degrees. The mineral is monoclinic, space group C2/m, with refined Unit-Cell parameters a = 9.937(5), b =...
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Source: China Business Newsweekly (2010-02-09)
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