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CC=Collection Code: [AB2X4]=ANX Form: [cF56]=Pearson: [e d a]=Wyckoff Symbol: [Al2MgO4]=Structure Type:
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CC=75625 Help
TitleCrystal structures and cation distributions in simple spinels from powder XRD structural refinements: Mg Cr2 O4, Zn Cr2 O4, Fe3 O4 and the temperature dependence of the cation distributionin Zn Al2 O4.
AuthorsO'Neill, H.S.C.;Dollase, W.A.
ReferencePhysics and Chemistry of Minerals (1994) 20, 541-555
Link XRef SCOPUS SCIRUS Google
CompoundCr2 Mg1 O4 - [Magnesiochromite] Magnesium dichromium tetraoxide [AB2X4] [cF56] [e d a] [Al2MgO4]
Cell8.3339(2), 8.3339(2), 8.3339(2), 90., 90., 90.
FD3-MZ (227) V=578.82
RemarksR=0.026000 : RVP TYP =Al2MgO4 : XDP MIN =Magnesiochromite :
Calculated density unusual but tolerable.
PD 10-351

Atom (site) Oxid. x, y, z, B, Occupancy
Mg1(8a)2
Cr1(8a)3
Mg2(16d)2
Cr2(16d)3
O1(32e)-2
0.1250.1250.1250.48(4)0.990(6)
0.1250.1250.1250.48(4)0.010(6)
0.50.50.50.28(1)0.005(3)
0.50.50.50.28(1)0.995(3)
0.2618(1)0.2618(1)0.2618(1)0.42(3)1

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