Sinkankasite

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]

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]

 

This article uses material from the Wikipedia article  Metasyntactic variable, which is released under the  Creative Commons Attribution-ShareAlike 3.0 Unported License.