Reddish-brown dorrite crystals associated to orange essenite, and also spinel and magnesioferrite. From: Chelyabinsk, Chelyabinsk Oblast, Russian Federation
General
Category
Mineral
Formula (repeating unit)
CaFeAlSiO6
Crystal class
Monoclinic – prismatic
Identification
Color
Reddish brown
Cleavage
110 – Perfect
Luster
Vitreous (glassy)
Streak
White
Diaphaneity
Transparent
Density
3.54
Esseneite is a relative rare mineral of the pyroxene group, with formula CaFeAlSiO6. It is the ferric-iron-dominant member. Esseneite is an iron-analogue of other pyroxene-group members, davisite, grossmanite, and kushiroite. It is a metamorphic mineral forming in pyrometamorphic rocks called paralavas, which are formed due to fusing on sedimentary rocks usually in result of coal fires. Esseneite is found in both natural and anthropogenic coal-fire sites.[1][2]
Esseneite was named for Eric J. Essene (1939–2011), a metamorphic petrologist and Professor of Geosciences at the University of Michigan.
The mineral crystallizes in the monoclinic crystal system with space group C2/c.[1]
^ abMichael A. Cosca, Donald R. Peacor, "Crystal structure of esseneite (CaFe3+AlSiO6), a new pyroxene produced by pyrometamorphism." American Mineralogist 72, 148–156 (1987)
^"Esseneite: Esseneite mineral information and data". Mindat.org. Retrieved 2016-03-02.
Esseneite is a relative rare mineral of the pyroxene group, with formula CaFeAlSiO6. It is the ferric-iron-dominant member. Esseneite is an iron-analogue...
(Grapes et al., 2010). These Fe-rich paralavas are composed of Fe-olivine, esseneite, dorite, melilite, Fe-cordierite, anorthite, spinel, tridymite, fayalite...
Kushiroite is an aluminium-analogue of other pyroxene-group members, davisite, esseneite, and grossmanite. It was found in a chondrite meteorite within refractory...
member. It stands for scandium-analogue of other pyroxene-group members, esseneite, grossmanite and kushiroite. Davisite is one of scarce minerals containing...
exclusively tetravalent. Grossmanite stands for titanium-analogue of davisite, esseneite and kushiroite – other members of the pyroxene group. Both grossmanite...
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