rockbridgeiten.
/ˈrɒkbrɪdʒʌɪt/, U.S. /ˈrɑkbrɪˌdʒaɪt/ Mineralogy.
An iron-containing mineral which occurs as dark green or black masses and crusts (turning brown in air owing to oxidation) in deposits of limonite and pegmatite.Rockbridgeite is a hydroxide and phosphate of iron (usually also with manganese), (Fe2+,Mn)Fe43+(PO4)3(OH)5. Crystal system: orthorhombic.
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the world > the earth > minerals > types of mineral > phosphates > [noun] > iron or manganese phosphates
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heterosite1834
triplite1850
zwieselite1861
reddingite1878
triploidite1878
purpurite1905
stewartite1912
phosphoferrite1921
landesite1930
rockbridgeite1949
wolfeite1949
kryzhanovskite1951
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switzerite1967
1949 C. Frondel in Amer. Mineralogist 34 513 The specific name dufrenite is here re-defined to apply to a particular member of the dufrenite-complex, and the new name rockbridgeite is proposed for another common member of this complex.
1960 F. H. Pough et al. Field Guide Rocks & Minerals (ed. 3) 213 Most old dufrenite specimens are actually now called frondelite or rockbridgeite.
2001 A. R. Woolley Alkaline Rocks & Carbonatites of World III. 258/1 He estimates a modal composition of 70–80% rockbridgeite, 20% goethite, 5–10% Al-strengite and various other secondary phases.
This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).
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n.1949