Pocket Mindat

East Mine, Bayan Obo (Bayun-Obo; Baiyunebo) deposit, Bayan Obo, Bayan Obo Mining District, Baotou League (Baotou Prefecture), Inner Mongolia Autonomous Region, China
© Pavel M. Kartashov
Formula:
(Nd,Ce,Ca)(Ti,Nb)2(O,OH)6
System: Orthorhombic
Name:
For its relationship to
IMA Status: Valid (Approved)
Type Locality:
Bayan Obo (Bayun-Obo; Baiyunebo) deposit, Bayan Obo, Bayan Obo Mining District, Baotou League (Baotou Prefecture), Inner Mongolia Autonomous Region, China
Dana 8th: 8.3.6.5
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
Hardness (Mohs): 5 - 6
Density: 4.6 g/cm3 to 5.04 g/cm3 (measured)
Lustre: Adamantine
Diapheny: Transparent,Translucent
Diapheny: brittle
Colour: Dark to pale brown, brownish black
Streak: Light yellowish brown