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Burtite

• Formula:
  Ca[Sn(OH)₆]

• System: Isometric

• Name:
  Named after Dr. Donald McLain Burt (1943– ), Professor of Mineralogy, Arizona State University, Tempe, Arizona, USA, authority on mineral equilibria in skarn and greisen deposits, who had predicted the natural occurrence of the compound.

• IMA Status: Valid (Approved)
  Approved 1980

• Type Locality:
  Beht River, El Hammam (El Hamman), Meknès, Meknès Prefecture, Meknès-Tafilalet Region, Morocco

• Dana 8th: 6.3.6.5
  
  6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
  3 : X(OH)₃

• Hardness (Mohs): 3

• Colour: colorless, pale yellow