hedenbergite – מילון אנגלי-אנגלי

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Hedenbergite

Hedenbergite, Ca Fe Si₂O₆, is the iron rich end member of the pyroxene group having a monoclinic crystal system. The mineral is extremely rarely found as a pure substance, and usually has to be synthesized in a lab. It was named in 1819 after M.A. Ludwig Hedenberg, who was the first to define hedenbergite as a mineral. Contact metamorphic rocks high in iron are the primary geologic setting for hedenbergite. This mineral is unique because it can be found in chondrites and skarns (calc–silicate metamorphic rocks). Since it is a member of the pyroxene family, there is a great deal of interest in its importance to general geologic processes.

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Mineralogy Database

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Hedenbergite

General Information:

Chemical Formula:
CaFe++Si2O6

Composition:
(Molecular Weight = 248.09 gm)
Calcium 16.15 % Ca
Iron 22.51 % Fe
Silicon 22.64 % Si
Oxygen 38.69 % O

Empirical Formula:
CaFe2+Si2O6

Environment:
Contact metasomatic rocks.

IMA Status:
Approved IMA 1987

Locality:
Nordmark, Sweden.

Name Origin:
Named after the Swedish mineralogist, M. A. L. Hedenberg.
Physical Properties:

Cleavage:
[???] Perfect, [???] Indistinct

Color:
brownish green, gray green, grayish black, dark green, or black.

Density:
3.55

Diaphaniety:
Transparent to translucent to opaque

Habits:
Granular - Generally occurs as anhedral to subhedral crystals in matrix., Crystalline - Fine - Occurs as well-formed fine sized crystals., Lamellar - Thin laminae producing a lamellar structure.

Hardness:
5-6 - Between Apatite and Orthoclase

Luminescence:
Non-fluorescent.

Luster:
Vitreous - Pearly

Streak:
white green
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Glosarium Pusat Bahasa Depdiknas Indonesia

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hedenbergite

B: (Kimia) hedenbergit

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hedenbergite – מילון אנגלי-עברי

hedenbergite – מילון אנגלי-אנגלי