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Aeschynite-(Nd)

• 
  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 Aeschynite-(Ce), with Neodymium as the dominant rare-earth element.

• 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