millisiten.
/ˈmɪlɪsʌɪt/, U.S. /ˈmɪləˌsaɪt/ Mineralogy.
A light grey or white hydrated basic phosphate of sodium, potassium, calcium, and aluminium, (Na,K)CaAl6(PO4)4(OH)9·3H2O, crystallizing in the tetragonal system and occurring as finely fibrous crusts and spherules.
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the world > the earth > minerals > types of mineral > phosphates > [noun] > others of two plus elements
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englishite1930
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lewistonite1930
millisite1930
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1930 E. S. Larsen & E. V. Shannon in Amer. Mineralogist 15 329 The name millisite is proposed for the species after F. T. Millis who sent the original specimens to the U.S. National Museum.
1942 Amer. Mineralogist 27 294 Millisite is invariably associated with wardite as alternating layers in spherules or crusts. It is light gray to white in color, and normally is present as layers of fine fibers normal to the layering.
1965 Jrnl. Geol. Soc. Austral. 12 261 Crandallite and millisite occur in the lateritic profiles derived from apatite and barrandite and the weathering, in the presence of phosphate, of the carbonate and volcanic rocks [on Christmas Island].
1989 Chem. Geol. 75 316/2 Two smectite samples, with traces of apatite and two samples of pure millisite were analyzed.
This entry has been updated (OED Third Edition, March 2002; most recently modified version published online March 2022).
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n.1930