Glaucochroite

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Glaucochroite
Glaucochroite-270038.jpg
Glaucochroite found in New Jersey
General
Category Silicate mineral
Formula
(repeating unit)		CaMnSiO4
Strunz classification 9.AC.05
Dana classification51.3.2.3
Crystal system Orthorhombic
Identification
ColorBluish-gray, pink, brown, or white
Fracture Conchoidal, Sub-Conchoidal
Mohs scale hardness6
Luster ResinVitreous, Sub-Vitreous, Resinousous
Streak white
Optical propertiesBiaxial (-)
References [1]

Glaucochroite is a calcium manganese nesosilicate mineral with formula CaMnSiO4. It occurs in metamorphosed limestones.

It was first described in 1899 in Franklin Furnace, Sussex County, New Jersey.

Related Research Articles

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<span class="mw-page-title-main">Bustamite</span>

Bustamite is a calcium manganese inosilicate (chain silicate) and a member of the wollastonite group. Magnesium, zinc and iron are common impurities substituting for manganese. Bustamite is the high-temperature polymorph of CaMnSi2O6 and johannsenite is the low temperature polymorph. The inversion takes place at 830 °C (1,530 °F), but may be very slow.
Bustamite could be confused with light-colored rhodonite or pyroxmangite, but both these minerals are biaxial (+) whereas bustamite is biaxial (-).

References

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