TY - JOUR
T1 - Stacking variations and nonstoichiometry in the bixbyite-braunite polysomatic mineral group
AU - De Villiers, J. P.
AU - Buseck, P R
PY - 1989/1/1
Y1 - 1989/1/1
N2 - Bixbyite, braunite, neltnerite, and braunite-II are members of a mineral group based on the cation arrangement of the fluorite structure type, with general formula M8O12 (M = Mn, Fe, Ca, Si). They consist of layer modules of (Mn,Fe)-O octahedra stacked in various sequences that depend on the coordination of interlayered M cations. The structures of 21 possible layer assemblages have been generated using stacking vectors derived from the known mineral varieties. These structures have been used to simulate the images obtained by electron microscopy. -from Authors
AB - Bixbyite, braunite, neltnerite, and braunite-II are members of a mineral group based on the cation arrangement of the fluorite structure type, with general formula M8O12 (M = Mn, Fe, Ca, Si). They consist of layer modules of (Mn,Fe)-O octahedra stacked in various sequences that depend on the coordination of interlayered M cations. The structures of 21 possible layer assemblages have been generated using stacking vectors derived from the known mineral varieties. These structures have been used to simulate the images obtained by electron microscopy. -from Authors
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M3 - Article
AN - SCOPUS:0024881457
SN - 0003-004X
VL - 74
SP - 1325
EP - 1336
JO - American Mineralogist
JF - American Mineralogist
IS - 11-12
ER -