Ad
related to: hornblende optical properties limited
Search results
Results From The WOW.Com Content Network
Hornblende is a complex inosilicate series of minerals. [6] It is not a recognized mineral in its own right, but the name is used as a general or field term, to refer to a dark amphibole. Hornblende minerals are common in igneous and metamorphic rocks. The general formula is (Ca,Na) 2−3 (Mg,Fe,Al) 5 (Al,Si) 8 O 22 (OH,F) 2.
Magnesiohastingsite is a calcium-containing amphibole and a member of the hornblende group. [5] It is an inosilicate (chain silicate) with the formula NaCa 2 (Mg 4 Fe 3+)(Si 6 Al 2)O 22 (OH) 2 [1] and molar mass 864.69 g. [2]
The coarse-grained labradorite-hypersthene-rock (norite) of Paul's Island off the coast of Labrador has furnished the most typical material; for this reason, the mineral has been known as Labrador hornblende or paulite. [1] Color is often gray, brown, or green, and the luster is usually vitreous to pearly.
The endmember hornblende tschermakite (☐Ca 2 (Mg 3 Al 2)(Si 6 Al 2)O 22 (OH) 2) is a calcium rich monoclinic amphibole mineral. It is frequently synthesized along with its ternary solid solution series members tremolite and cummingtonite so that the thermodynamic properties of its assemblage can be applied to solving other solid solution series from a variety of amphibole minerals.
Edenite or edenitic hornblende is a double chain silicate mineral of the amphibole group with the general chemical composition NaCa 2 Mg 5 (Si 7 Al)O 22 (OH) 2. Edenite is named for the locality of Edenville, Orange County, New York , where it was first described.
Arfvedsonite (/ ˈ ɑːr v ɛ d s ə n aɪ t / [6]) or soda hornblende (partiellement obsolète) is a sodium amphibole mineral with composition: [Na][Na 2][(Fe 2+) 4 Fe 3+][(OH) 2 |Si 8 O 22].It crystallizes in the monoclinic prismatic crystal system and typically occurs as greenish black to bluish grey fibrous to radiating or stellate prisms.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Cummingtonite is commonly found in metamorphosed magnesium-rich rocks and occurs in amphibolites. Usually it coexists with hornblende or actinolite, magnesium clinochlore chlorite, talc, serpentine-antigorite minerals or metamorphic pyroxene. Magnesium-rich cummingtonite can also coexist with anthophyllite.