• Brownmillerite - Wikipedia

    en.wikipedia.org/wiki/Brownmillerite Brownmillerite is a rare oxide mineral with chemical formula Ca 2 (Al,Fe) 2 O 5.It is named for Lorrin Thomas Brownmiller (1902–1990), chief chemist of the Alpha Portland Cement Company, Easton, Pennsylvania. Discovery and occurrence. The chemical compound was first recognized in 1932 and named for the chemist who identified it.
  • Brownmillerite: Mineral information, data and localities.

    www.mindat.org/min-790.html Brownmillerite-Srebrodolskite Series. Compare also the related species shulamitite.
  • Brownmillerite - an overview | ScienceDirect Topics

    www.sciencedirect.com/topics/engineering/brownmillerite In this system the phase of most significance to Portland and aluminous cements is brownmillerite, the only ternary phase in the system.It is considered to have the composition Ca 2 (Al x Fe 1-x) 2 O 5 where x is between 0.48 and 0.7; if CaO is also present, x is fixed at 0.48, 50, 51 giving a composition close to C 4 AF. This phase is commonly known as ferrite, which in real cements contains ...
  • Brownmillerite | Article about brownmillerite by The Free ...

    encyclopedia2.thefreedictionary.com/brownmillerite Find out information about brownmillerite. A mineral compound occurring in portland cement and high-alumina cement; consists of an oxide of calcium, aluminum, and iron Explanation of brownmillerite. Brownmillerite | Article about brownmillerite by The Free Dictionary.
  • Brownmillerite | Definition of Brownmillerite by Merriam ...

    www.merriam-webster.com/dictionary/brownmillerite Brownmillerite definition is - a mineral Ca2AlFeO5 consisting of an oxide of calcium, iron, and aluminum.
  • Brownmillerite-Type Sr2ScGaO5 Oxide Ion Conductor: Local ...

    pubs.acs.org/doi/pdf/10.1021/acs.chemmater.9b02051 ature, brownmillerite-type materials can exhibit oxide ion, mixed ionic-electronic, or proton conductivity. At elevated temperatures, many undergo phase transitions in which vacancies become disordered, and this is often accompanied by a marked increase in oxide ion conductivity. For example, Ba 2 In 2 O 5 is a moderate oxide ion conductor ...
  • Brownmillerite Mineral Data

    webmineral.com/data/Brownmillerite.shtml Visit our Advertisers for Brownmillerite : A Bijoux Google Search for Brownmillerite Dakota Matrix Minerals Google Search for Brownmillerite John Betts Fine Minerals Search for Brownmillerite McDougall Minerals Google Search for Brownmillerite Rock and Mineral Shows Google Search for Brownmillerite Weinrich Minerals, Inc. Google Search for ...
  • Growth of Stoichiometric Brownmillerite Oxides: Sr2 5 and ...

    www.mdpi.com/2073-4352/6/11/146/pdf Crystals 2016, 6, 146 3 of 11 of brownmillerite-type oxides, and especially during crystal growth. Additional complexity arises for non-stoichiometric A2B2O5+ phases, which can already undergo reversible oxygen intercalation reactions at room temperature, and the formation of complex twin structures have been reported for
  • Topotactic Phase Transformation of the Brownmillerite ...

    onlinelibrary.wiley.com/doi/full/10.1002/adma.201300531 Pulsed laser epitaxy of brownmillerite SrCoO 2.5 thin films and their phase transformation to the perovskite SrCoO 3–δ are investigated. While the direct growth of the fully oxidized perovskite films is found to be an arduous task, filling some of oxygen vacancies into SrCoO 2.5 by topotactic oxidation accompanies systematic evolution of electronic, magnetic, and thermoelectric properties ...
  • Crystal structure of brownmillerite Ba2InGaO5 - ScienceDirect

    www.sciencedirect.com/science/article/pii/S0022459614002540 Ba 2 InGaO 5 was prepared by high-temperature solid-state reaction. This compound adopts a brownmillerite structure below 1200 °C, which was not found in past studies of Ba 2 (In 1−x Ga x) 2 O 5.Combined structure refinements against neutron and X-ray powder diffraction data show that this material adopts a layered ordering of In and Ga.