Information card for entry 9003940

Structure parameters

• Mineral name: Spinel
• Formula: Al1.819 Cr0.03 Mg1.151 O4
• Calculated formula: Al1.819 Cr0.03 Mg1.151 O4
• Title of publication: Kinetics of cation ordering in natural Mg(Al,Cr3+)2O4 spinels Sample: Ch, annealed at T = 650 C, disordering, t = 3960 m
• Authors of publication: Princivalle, F.; Martignago, F.; Dal Negro, A.
• Journal of publication: American Mineralogist
• Year of publication: 2006
• Journal volume: 91
• Pages of publication: 313 - 318
• a: 8.0889 Å
• b: 8.0889 Å
• c: 8.0889 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 529.259 ų
• Sample thermal history: annealed at T = 650 C, disordering, t = 3960 m
• Number of distinct elements: 4
• Space group number: 227
• Hermann-Mauguin space group symbol: F d -3 m :2
• Hall space group symbol: -F 4vw 2vw 3
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No