Natrophilite

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Natrophilite
Natrophilite-Lithiophilite-200020.jpg
Natrophilite, as thin coatings and fracture fillings, from Branchville, Redding, Fairfield County, Connecticut, US
General
CategoryPhosphate mineral
Formula
(repeating unit)
NaMnPO4
Strunz classification8.AB.10
Crystal systemOrthorhombic
Crystal classDipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
Space groupPnam
Identification
ColorDeep yellow to light yellow
CleavageDistinct/ good
FractureIrregular/ uneven
TenacityBrittle
Mohs scale hardness4 12 - 5
LusterSub-vitreous, greasy
StreakWhite
DiaphaneityTransparent, translucent
Specific gravity3.41 g/cm3

Natrophilite is a mineral with the chemical formula NaMnPO4. In a pure form it has a yellow coloration. Its crystals are orthorhombic to dipyramidal. It is transparent to translucent. It is not radioactive. Natrophilite is rated 4.5 to 5 on the Mohs Scale.

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