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xanthorthite
xanthorthite n.
Brit. 
/zanˈθɔːθʌɪt/
, /zanˈθɔːθʌɪt/U.S. /zænˈθɔrˌθaɪt/
Mineralogy a yellow variety of orthite./zænˈθɔrˌθaɪt/ΘΚΠ
the world > the earth > minerals > types of mineral > silicates > epidote group > [noun] > allanite
allanite1810
orthite1817
bucklandite1824
tautolite1828
xanthorthite1868
pumpellyite1925
1868 J. D. Dana Syst. Mineral. (ed. 5) 287 Xanthorthite, of Hermann,..is apparently an altered variety [of orthite].
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