Читать книгу The Rare Earths: Their Occurrence, Chemistry, and Technology - Stanley Isaac Levy - Страница 95
Muromontite.
Оглавление A variety of Allanite (q.v.), rich in yttria earths and Be, but poor in Al and ceria earths. Cer = 9·1; Yttr = 37·1%.
See Allanite.
G = 4·263. H = 7. Black to greenish black.
Mauersberg, Erzgebirge, Saxony.
