The structure of rankinite

作者: Isao KUSACHI , Chiyoko HENMI , Akira KAWAHARA , Kitinosuke HENMI

DOI: 10.2465/MINERJ.8.38

关键词:

摘要: The crystal structure of rankinite has been determined by Patterson and direct methods refined to R=11.6%, using a from Fuka, Bitchu-cho, Japan: P21⁄a, 10.60(2), b 8.92(2), c 7.89(2)A, β 119.6(1)°, Z=4 Ca3Si2O7. There are in the arrays Si2O7 groups parallel axis, linked together Ca’s each having seven near oxygen atoms: Ca–O bond length is range 2.25 2.90 A. Si–O 1.52 1.65 structural relationships between (Ca3Si2O7) kilchoanite [Ca6(SiO4)(Si3O10)] described briefly.

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