fairfielditen.
/ˈfɛːfiːldʌɪt/, U.S. /ˈfɛrfilˌdaɪt/ Mineralogy.
A phosphate mineral typically found as greenish or yellowish-white prismatic crystals and crystal aggregates.Fairfieldite is a hydrated phosphate of calcium, manganese, and iron, Ca2(Mn,Fe)(PO4)2·2H2O. Crystal system: triclinic.
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1878 G. J. Brush & E. S. Dana in Amer. Jrnl. Sci. 116 123 Within a few months we shall describe under the name of fairfieldite a sixth new species, whose character has been determined too late to find a place in these pages.
1921 Amer. Mineralogist 6 66 Secondary phosphates include..some fairfieldite (identified optically), phosphosiderite, and strengite.
1994 Inorg. Chem. 33 2612/1 This type of chain is the basis of the minerals kröhnkite.., talmessite.., and fairfieldite.
2006 J. A. Pawloski Connecticut Mining iv. 49 The Branchville Quarry..is world famous for the eight new phosphate minerals discovered there; eosphorite, triploidite, dickinsonite, natrophilite, lithiophilite, reddingite, fairfieldite, and fillowite.
This entry has been updated (OED Third Edition, December 2013; most recently modified version published online March 2022).
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