Information card for entry 9017030

Structure parameters

• Mineral name: Spinel
• Formula: Al1.6 Cr0.4 Fe0.25 Mg0.75 O4
• Calculated formula: Al12.8 Cr3.2 Fe2 Mg6 O32
• Title of publication: Low intra-crystalline closure temperatures of Cr-bearing spinels from the mantle xenoliths of the Middle AtlasNeogene-Quaternary Volcanic Field (Morocco):Mineralogical evidence of a cooler mantle beneath the West African Craton. Note:Sample MAR-BI4
• Authors of publication: Lenaz, D.; Youbi, N.; Min, A. D.; Boumehdi, M. A.; Abbou, M. B.
• Journal of publication: American Mineralogist
• Year of publication: 2014
• Journal volume: 99
• Pages of publication: 267 - 275
• a: 8.1454 Å
• b: 8.1454 Å
• c: 8.1454 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 540.427 ų
• Number of distinct elements: 5
• 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