A silicate of E and Ca, with Zr, Be, Th, Al, Fe, aq., etc. An altered Homilite? Cer = 17·7-34·9; Yttr = 1·4-2·1; ThO₂ + ZrO₂ = 0-12%.
Amorphous; isotropic.
G = 3·01-3·39. H = 41⁄2. Brown to leek-green.
Near Brevig, Norway.
Erikite.
A phosphosilicate of E, Ca, Al, K and Na, with ThO₂, H₂O, etc. Cer = 40·5; ThO₂ = 3·3%.
Orthorhombic.
G = 3·473. H = 51⁄2-6. Brown; opaque.
Julianehaab, Greenland.