oellacheriten.
/əːˈlakərʌɪt/, U.S. /əˈlækəˌraɪt/ Mineralogy.
A white or pink variety of muscovite containing a significant proportion of barium.
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the world > the earth > minerals > types of mineral > silicates > phyllosilicate > [noun] > mica > muscovite > varieties
talcite1836
fuchsite1844
sericite1853
oncosine1854
adamsite1859
oellacherite1867
mariposite1868
gümbelite1871
hydro-muscovite1889
1867 J. D. Dana in Amer. Jrnl. Sci. 94 256 (table) Œllacherite. [Note] Œllacher's margarite from Pfitschthal [Tyrol].
1933 Amer. Mineralogist 18 30 A massive pink mineral with obscure cleavage..appeared under the microscope to have a micaceous texture and had about the optical characters of muscovite... The varietal name oellacherite is given by Dana to this barium-muscovite.
1949 Chem. Abstr. 43 6120 The discovery of a previously unknown mineral in the mountains of Kara-Tau in Kazakhstan is reported... The chem. compn. corresponds to œllacherite in which a part of the AL2O3 is isomorphically displaced by V2O3.
2001 Jrnl. Geol. (Chicago) 109 622/1 A systematic survey..revealed..Ba-enriched rims of white mica having up to 19 mol % of the theoretical Ba end-member (‘oellacherite’).
This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).
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n.1867