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Encyclopedia > Hedenbergite

Hedenbergite, or calcium iron pyroxene, is a black mineral closely allied to diopside and, owing to the isomorphous replacement of iron by magnesium, there is no sharp line of division between them. Hedenbergites chemical forumula is CaFe[Si_2 O_6] General Name, Symbol, Number calcium, Ca, 20 Chemical series alkaline earth metals Group, Period, Block 2, 4, s Appearance silvery white Atomic mass 40. ... Figure 1:Mantle-peridotite xenolith with green peridot olivine and black pyroxene crystals from San Carlos Indian Reservation, Gila Co. ... Diopside is a monoclinic pyroxene mineral with composition MgCaSi2O6. ...

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  • This article incorporates text from the Encyclop√¶dia Britannica Eleventh Edition, a publication now in the public domain.

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HEDENBERGITE Chapter17. Inosilicates - chain silicates (337 words)
Hedenbergite is found at both Franklin and Sterling Hill, but is an uncommon mineral at both localities, being restricted to a few anomalous assemblages, in keeping with the dominant Mn/Mg local solid solution and the paucity of iron silicates.
Hedenbergite is a calcium iron silicate mineral of the pyroxene group and the Fe-analogue of diopside.
Hedenbergite was found in an assemblage of calcite, franklinite, ferroactinolite, and andradite from drill-hole #124, 119 feet from its origin on the 340 level, surrounded by andradite and altering to cummingtonite and ferroactinolite (Reilly, 1983).
Bob's Rock Shop: Quartz with Hedenbergite Inclusions (536 words)
Hedenbergite is a member of the pyroxene group, which is an important and widely distributed group of rock-forming silicates.
Hedenbergite is a member of the clinopyroxenes, which crystallize in the monoclinic system and contain calcium, iron, aluminum, sodium, or lithium.
Hedenbergite crystals commonly occur as radiating fibrous aggregates, with stubby, prismatic crystals of nearly square cross section being rarer.
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