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Davidite-(La) from Kazakhstan
Category Oxide minerals
(repeating unit)
Strunz classification 4.CC.40
Crystal system Trigonal
Crystal class Rhombohedral (3)
H-M symbol: (3)
Space group R3
Unit cell a = 10.376, c = 20.91 [Å]; Z = 3
Color Black
Fracture Subconchoidal to uneven
Tenacity Brittle
Mohs scale hardness ~6
Luster Vitreous
Diaphaneity Opaque, translucent in very thin fragments
Specific gravity 4.33 to 4.48
Alters to Metamict
References [1][2][3][4]

Davidite is a rare earth oxide mineral with chemical end members La and Ce. It exists in two forms:


  1. ^ Davidite-La in Handbook of Mineralogy
  2. ^ Davidite-La on Mindat
  3. ^ Davidite-(La) on Webmineral
  4. ^ Davidite-(Ce) on Webmineral
  5. ^ Branagan, D.F. (2005): T.W. Edgeworth David: A Life: Geologist, Adventurer and "Knight in the Old Brown Hat", National Library of Australia, Canberra, p. 471. ISBN 0 642 10791 2