foyaiten.
/ˈfəʊjəʌɪt/ Mineralogy.
A kind of syenite.
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the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > plutonic rocks > syenite > varieties of
miaskite1840
uralite-syenite1868
foyaite1878
nepheline-syenite1885
pulaskite1891
nordmarkite1892
larvikite1895
shonkinite1895
1878 P. H. Lawrence tr. B. von Cotta Rocks Classified (new ed.) 169 In the syenite group we also include..foyaite.
1879 F. Rutley Study of Rocks x. 108 Elæolite is a constituent of the rocks zircon-syenite, foyaite, miascite, and ditroite.
This entry has not yet been fully updated (first published 1897; most recently modified version published online June 2018).
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n.1878