Akrochordite, (Mn,Mg)5(OH)4(H2O)4(AsO4)2; a sheet structure with amphibole walls

Akrochordite, (Mn,Mg)5(OH)4(H2O)4(AsO4)2, monoclinic holosymmetric, a 5.682(2), b 17.627(5), c 6.832(1) Angstrom, beta 99.49(2) degrees , Z = 2, space group P21/c; D(obs) 3.19, 3.26, D(calc) 3.26 g/cm3 for (Mn0.80Mg0.20), has 12 non-H atoms in the asymmetric unit. R = 0.036 for 1295 independent Fo....

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Bibliographic Details
Published in:The American mineralogist 1989-02, Vol.74 (1-2), p.256-262
Main Authors: Moore, Paul Brian, Sen Gupta, Pradip K, Schlemper, Elmer O
Format: Article
Language:English
Subjects:
akrochordite
amphibole structure
arsenates
bonding
crystal growth
crystal structure
formula
mineral data
Mineralogy
minerals
nonsilicates
sheet structure
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Summary:Akrochordite, (Mn,Mg)5(OH)4(H2O)4(AsO4)2, monoclinic holosymmetric, a 5.682(2), b 17.627(5), c 6.832(1) Angstrom, beta 99.49(2) degrees , Z = 2, space group P21/c; D(obs) 3.19, 3.26, D(calc) 3.26 g/cm3 for (Mn0.80Mg0.20), has 12 non-H atoms in the asymmetric unit. R = 0.036 for 1295 independent Fo. Bond distances and related structural elements are analysed.
ISSN:0003-004X
1945-3027