TY - JOUR
T1 - Refinement of the crystal structure of neltnerite, a member of the bixbyite-braunite group of minerals
AU - De Villiers, J. P.R.
AU - Dobson, S. M.
AU - Buseck, P. R.
PY - 1991/1/1
Y1 - 1991/1/1
N2 - The crystal structure of neltnerite CaMn6SiO12 was confirmed by Patterson methods and refined to an R = 0.03 based on 763 observed reflections. The mineral is tetragonal with refined cell constants a = 9.468(1) Å and c = 18.862(2) Å and with space group I41/acd. The structure corresponds closely to that of braunite, with Ca in distorted cubic coordination, Si in tetrahedral coordination, and three Mn atoms in octahedral coordination showing Jahn-Teller distortion. Mean interatomic distances are 2.377 Å for Ca-O; 2.041, 2.066 and 2.046 Å for Mn-O; and 1.621 Å for Si-O. -from Authors
AB - The crystal structure of neltnerite CaMn6SiO12 was confirmed by Patterson methods and refined to an R = 0.03 based on 763 observed reflections. The mineral is tetragonal with refined cell constants a = 9.468(1) Å and c = 18.862(2) Å and with space group I41/acd. The structure corresponds closely to that of braunite, with Ca in distorted cubic coordination, Si in tetrahedral coordination, and three Mn atoms in octahedral coordination showing Jahn-Teller distortion. Mean interatomic distances are 2.377 Å for Ca-O; 2.041, 2.066 and 2.046 Å for Mn-O; and 1.621 Å for Si-O. -from Authors
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U2 - 10.1127/ejm/3/3/0567
DO - 10.1127/ejm/3/3/0567
M3 - Article
AN - SCOPUS:0025955893
SN - 0935-1221
VL - 3
SP - 567
EP - 573
JO - European Journal of Mineralogy
JF - European Journal of Mineralogy
IS - 3
ER -