zinnwalditen.
/ˈzɪnwɒldʌɪt/, /ˈtsɪnvaltʌɪt/, U.S. /ˈzɪnˌwɔldˌaɪt/, /ˈzɪnˌwɑldˌaɪt/, /ˈtsɪnˌvɔltˌaɪt/, /ˈtsɪnˌvɑltˌaɪt/ Mineralogy.
A kind of mica containing lithium and iron, mined as a source of lithium.Not now regarded as a distinct mineral species, but as forming a series intermediate in composition between siderophyllite and polylithionite.
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the world > the earth > minerals > types of mineral > silicates > phyllosilicate > [noun] > mica > lepidolite > varieties
zinnwaldite1850
cryophyllite1866
polylithionite1884
protolithionite1892
1850 J. D. Dana Syst. Mineral. (ed. 3) 361 The Zinnwald mica has been called Zinnwaldite.
1915 Proc. National Acad. Sci. U.S.A. 1 576 The potassium-lithium mica, zinnwaldite or cryophyllite, carries much more iron than magnesium.
2017 ENP Newswire (Nexis) 1 Mar. Further pilot testing is planned on a range of materials including lepidolite, zinnwaldite and spodumene.
This entry has been updated (OED Third Edition, March 2021; most recently modified version published online March 2022).
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