• Pocket Mindat

• Return to Index: C
• Return to Main Index

Calderite

• 
  Otjosondu, Otjozondjupa Region, Namibia
  © C.Boutry

• Formula:
  (Mn²⁺,Ca)₃(Fe³⁺,Al)₂(SiO₄)₃

• System: Isometric

• Name:
  Named in honor of James Calder, an early writer on the geology of India. The name was first applied to a rock, and was later transferred to its predominant mineral.

• IMA Status: Valid (Grandfathered)

• Type Locality:
  Katkamsandi, Hazaribagh District, Jharkhand, India

• Dana 8th: 51.4.3a.6
  
  51 : NESOSILICATES Insular SiO₄ Groups Only
  4 : Insular SiO₄ Groups Only with cations in [6] and >[6] coordination

• Colour: Dark reddish brown to dark yellowish, brown-yellow