Information card for entry 9007346

Structure parameters

• Mineral name: Hercynite
• Formula: Al1.94 Fe0.77 Mg0.29 O4
• Calculated formula: Al1.94 Fe0.77 Mg0.29 O4
• Title of publication: Controlled time-temperature oxidation reaction in a synthetic Mg-hercynite Spinel structure Sample: Annealing temperature and time T = 500 C, t = 24 h
• Authors of publication: Lavina, B.; Princivalle, F.; Della Giusta, A.
• Journal of publication: Physics and Chemistry of Minerals
• Year of publication: 2005
• Journal volume: 32
• Pages of publication: 83 - 88
• a: 8.1388 Å
• b: 8.1388 Å
• c: 8.1388 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 539.115 ų
• Ambient diffraction temperature: 773.15 K
• Sample thermal history: Annealing temperature and time T = 500 C, t = 24 h
• 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