Churchite

Formula: (Y,Ce)PO₄ · 2H₂O

Mohs scale hardness: 3

Specific gravity: 3,26 g/cm³

^{Rare earth elements}^{: Ce, Y, Dy, Nd, Eu, Ho}

^{Rare earth content, %:}^{51,3 %}

Other constituents, %: As, V

Mineralklasse: Phosphate, Arsenate, Vanadate

Uses: as a very minor ore of yttrium and erbium and as mineral specimens.

References