Sinkankasite

Sinkankasite
Sinkankasite
General
Category	Phosphate mineral
Formula; (repeating unit)	H; 2MnAl(PO; 4); 2(OH)·6H; 2O
IMA symbol	Ska
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

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 (formerly ), east of Keystone, South Dakota, and in the , 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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[1] 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.

[2] Mineralienatlas

[3] Mindat

[4] Burns P C, Hawthorne F C. 1995. "Sinkankasite." American Mineralogist, 80 (1995) p.620-627.

[5] Mitchelll, Richard S. 1986. "Who's Who in Mineral Names; John Sinkankas." Rocks and Minerals. Volume 61 (1), page 28.

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