Amphiboles (crystal chemistry, phase relations and occurrence) by W. G. Ernst
نویسندگان
چکیده
منابع مشابه
The crystal chemistry of the amphiboles II Refinement of the crystal structure of oxy-kaersutite
Three-dimensional counter-diffractometer data corrected for absorption and a full matrix least-squares method have been used to refine the crystal structure of an oxy-kaersutite in the on oal om os t on of 9t ~176 Oa.10 T10.~15Mn0.009A10.a~GS15.s~sA12.1220~(O )2 wlth cell and 3 lO5"388(5) ~ Cation site occupancies were refined using bulk chemical constraints and the A-site positionally disorder...
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Three-dimensional counter-diffractometer data and a full-matrix least-squares method have been used to refine the crystal structure of a sub-silicic hastingsite in the space group C2/rn. The chemical composition of the amphibole is Na~.95K~.a~Cax.~4(Mg1.17Fe~+7Mn~.~4Ti~.39Fe~9A~.5~)Si5.2~A~2.~3~22.5~(~H)x.a4 with ceil parameters a = 9"8659(4), b = I8"OI39(8), c = 5'3545(2)-&, and fi = IO5O82(1)...
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In this paper, we first introduce the concepts of G-systems, quotient G-systems and isomorphism theorems on G-systems of n-ary semihypergroups . Also we consider the Green's equivalences on G-systems and further in-vestigate some of their properties. A number of n-ary semihypergroups are constructed and presented as examples in this paper.
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ژورنال
عنوان ژورنال: Journal of Applied Crystallography
سال: 1968
ISSN: 0021-8898
DOI: 10.1107/s0021889868005625