TY - JOUR
T1 - The effect of Fe on the crystal structure of wadsleyite β-(Mg1 - xFex)2SiO4, 0.00≤x≤0.40
AU - Finger, Larry W.
AU - Hazen, Robert M.
AU - Zhang, Jinmin
AU - Ko, Jaidong
AU - Navrotsky, Alexandra
PY - 1993/1
Y1 - 1993/1
N2 - Single crystals of five wadsleyite compositions, β-(Mg,Fe)2SiO4 with Fe/(Fe+Mg)=0.00, 0.08, 0.16, 0.25 and 0.40, have been synthesized at high temperature and pressure in a uniaxial, split-sphere apparatus. Crystal structures of these samples, determined by x-ray diffraction techniques, reveal that iron is significantly ordered: Fe is depleted in the M2 octahedron, while it is enriched in M1 and M3. The most iron-rich synthetic sample, which falls well outside previous estimates of wadsleyite stability, raises questions regarding published Mg2SiO4-Fe2SiO4 phase diagrams at transition zone conditions.
AB - Single crystals of five wadsleyite compositions, β-(Mg,Fe)2SiO4 with Fe/(Fe+Mg)=0.00, 0.08, 0.16, 0.25 and 0.40, have been synthesized at high temperature and pressure in a uniaxial, split-sphere apparatus. Crystal structures of these samples, determined by x-ray diffraction techniques, reveal that iron is significantly ordered: Fe is depleted in the M2 octahedron, while it is enriched in M1 and M3. The most iron-rich synthetic sample, which falls well outside previous estimates of wadsleyite stability, raises questions regarding published Mg2SiO4-Fe2SiO4 phase diagrams at transition zone conditions.
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U2 - 10.1007/BF00202973
DO - 10.1007/BF00202973
M3 - Article
AN - SCOPUS:0027426518
SN - 0342-1791
VL - 19
SP - 361
EP - 368
JO - Physics and Chemistry of Minerals
JF - Physics and Chemistry of Minerals
IS - 6
ER -