Sinkankasite

Sinkankasite

Sinkankasite
General
Category Phosphate mineral
Formula
(repeating unit)		 H
2MnAl(PO
4)
2(OH)·6H
2O
Strunz classification 8.DB.20
Crystal system Triclinic
Crystal class Pinacoidal (1)
(same H-M symbol)
Space group P1
Identification
Color Colorless
Mohs scale hardness 4
Luster Vitreous
Diaphaneity Transparent
References [1][2]

Sinkankasite, mineral formula: H
2MnAl(PO
4)
2(OH)·6H
2O, was named after John Sinkankas (1915–2002), noted author and mineral collector, Scripps Institute of Oceanography.[3] It is triclinic; as colorless, bladed to prismatic crystals up to 4 mm in length, often as divergent, radial aggregates and as pseudomorphs after triphlyte crystals; occurs in the Barker pegmatite (formerly Ferguson pegmatite), east of Keystone, South Dakota, and in the Palermo pegmatite, North Groton, New Hampshire.[4]

References

  1. ↑ Mineralienatlas
  2. ↑ Mindat
  3. ↑ Burns P C, Hawthorne F C. 1995. "Sinkankasite." American Mineralogist, 80 (1995) p.620-627.
  4. ↑ Mitchelll, Richard S. 1986. "Who's Who in Mineral Names; John Sinkankas." Rocks and Minerals. Volume 61 (1), page 28.
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