The Rare Earths: Their Occurrence, Chemistry, and Technology

by Stanley Isaac Levy

Microcrystalline.

G = 3. H = 6. White to brown. Translucent.

Diamond sands of Brazil.

Guarinite.

Formerly supposed to be dimorphous with [Titanite] (q.v.); shown by Zambonini and Prior (1909) to be identical with [Hiortdahlite] (q.v.).

Hainite.

Tantalo-silicate and titanate of Zr, Ca, Na. ZrO₂ = 29-32%.

Anorthic.

G = 3·2. H = 5. Colourless to yellow; transparent.

Bohemia.