Brownmillerite R130105

Name: Brownmillerite
RRUFF ID: R130105
Ideal Chemistry: Ca2Fe3+AlO5
Locality: Ettringer Feld, Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany
Source: Donald Doell [view label]
Owner: RRUFF
Description: Brownish-red platy crystals. Diffraction indicates an I-centered lattice
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Mineral Groups: [ Brownmillerite (2) ] [ Perovskite (39) ]
Sample Description: Unoriented sample

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RRUFF ID: R130105
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
RRUFF ID: R130105.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 5.353(1)Å    b: 14.504(3)Å    c: 5.583(1)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 433.4(1)Å3    Crystal System: orthorhombic
  File Type Information Close
Calculated diffraction file.

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Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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REFERENCES for Brownmillerite

American Mineralogist Crystal Structure Database Record: [view record]

Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file]

Bertaut E F, Blum P, Sagnières A (1959) Structure du ferrite bicalcique et de la brownmillerite, Acta Crystallographica, 12, 149-159

Hentschel G (1964) Mayenit, 12CaO·7Al2O3, und brownmillerit, 2CaO·(Al,Fe)2O3, zwei neue minerale in den kalksteinschlüssen der lava des Ettringer Bellerberges, Neues Jahrbuch für Mineralogie, Monatshefte, 1964, 22-29

Fleischer M (1965) New mineral names, American Mineralogist, 50, 2096-2111   [view file]

Colville A A, Geller S (1971) The crystal structure of brownmillerite, Ca2FeAlO5, Acta Crystallographica, B27, 2311-2315

Redhammer G J, Tippelt G, Roth G, Amthauer G (2004) Structural variations in the brownmillerite series Ca2(Fe2-xAlx)O5: Single-crystal X-ray diffraction at 25°C and high-temperature X-ray powder diffraction (25°C< T <1000°C), American Mineralogist, 89, 405-420   [view file]

Vanpeteghem C B, Angel R J, Zhao J, Ross N L, Redhammer G J, Seifert F (2008) The effect of oxygen vacancies and aluminium substitution on the high-pressure properties of brownmillerite-structured Ca2Fe2-xAlxO5, Physics and Chemistry of Minerals, 35, 493-504

Mitchell R H, Welch M D, Chakhmouradian A R (2017) Nomenclature of the perovskite supergroup: A hierarchical system of classification based on crystal structure and composition, Mineralogical Magazine, 81, 411-461   [view file]