Information card for entry 9016470

Structure parameters

• Mineral name: Brownmillerite
• Formula: Al0.37 Ca2 Fe1.63 O5
• Calculated formula: Al1.48 Ca8 Fe6.52 O20
• Title of publication: The effect of oxygen vacancies and aluminium substitution on the high-pressure properties of brownmillerite-structured Ca2Fe2-xAlxO5 Note: x = 0.37 Note: P = 6.267 GPa
• Authors of publication: Vanpeteghem, C. B.; Angel, R. J.; Zhao, J.; Ross, N. L.; Redhammer, G. J.; Seifert, F.
• Journal of publication: Physics and Chemistry of Minerals
• Year of publication: 2008
• Journal volume: 35
• Pages of publication: 493 - 504
• a: 5.3246 Å
• b: 14.4558 Å
• c: 5.5273 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 425.444 ų
• Number of distinct elements: 4
• Space group number: 62
• Hermann-Mauguin space group symbol: P n m a
• Hall space group symbol: -P 2ac 2n
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No