Information card for entry 9016018

Structure parameters

• Mineral name: Brownmillerite
• Formula: Al0.55 Ca2 Fe1.45 O5
• Calculated formula: Al2.2 Ca8 Fe5.8 O20
• Title of publication: The effect of oxygen vacancies and aluminium substitution on the high-pressure properties of brownmillerite-structured Ca2Fe2-xAlxO5 Note: x = 0.55 Note: P = 4.511 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: 5.324 Å
• b: 14.438 Å
• c: 5.545 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 426.233 ų
• Number of distinct elements: 4
• Space group number: 46
• Hermann-Mauguin space group symbol: I 2 m b
• Hall space group symbol: I -2b 2
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No