Sinkankasite
(repeating unit)H
2MnAl(PO
4)
2(OH)·6H
2O IMA symbol Ska[1] 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 [2][3]
2MnAl(PO
4)
2(OH)·6H
2O
(same H-M symbol)
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.[4] 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.[5]
References
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ Mineralienatlas
- ^ Mindat
- ^ Burns P C, Hawthorne F C. 1995. "Sinkankasite." American Mineralogist, 80 (1995) p.620-627.
- ^ Mitchelll, Richard S. 1986. "Who's Who in Mineral Names; John Sinkankas." Rocks and Minerals. Volume 61 (1), page 28.
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