2007-02-23 12:05:11 · 8 answers · asked by sonyviki 1 in Science & Mathematics ➔ Astronomy & Space
Hornblende is a complex inosilicate series of minerals. Hornblende 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. It is an isomorphous mixture of three molecules; a calcium-iron-magnesium silicate, an aluminium-iron-magnesium silicate and an iron-magnesium silicate. Manganese, titanium and sodium are sometimes present. Fluorine often substitutes for the hydroxyl in the structure. The general formula can be given as (Ca,Na)2-3(Mg,Fe,Al)5(Al,Si)8O22(OH,F)2. Hornblende has a hardness of 5 - 6, a specific gravity of 2.9 - 3.4 and is typically an opaque green, greenish-brown, brown or black colour. Its cleavage angles are at 56 and 124 degrees. It is most often confused with the minerals augite and biotite mica, both of which are black and can be found in granite and in charnockite.
Hornblende is a common constituent of many igneous and metamorphic rocks such as granite, syenite, diorite, gabbro basalt, andesite, gneiss and schist. It is the principal mineral of amphibolites. Very dark brown to black hornblendes that contain titanium are ordinarily called basaltic hornblende, from the fact that they are usually a constituent of basalt and related rocks. Hornblende alters easily to chlorite and epidote. A variety of hornblende that contains less than 5% of iron oxides is gray to white in color and named edenite, from its locality in Edenville, New York. Other minerals in the hornblende series include: pargasite, hastingsite and tschermakite.
The word hornblende is derived from the German horn and blenden, to 'blind' or 'dazzle'. The term blende is often used to refer to a brilliant non-metallic lustre, for example, zincblende and pitchblende, a lustrous form of uraninite.
Or somethin'.
2007-02-23 12:19:55 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Horn blende is the mixing of horn sounds in an orchestra.
2007-02-23 20:56:31 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Im guessing blending up the horn of a unicorn or something, we cant all be geniuses u know!
2007-02-23 20:08:07 · answer #3 · answered by huhwhatcaca 2 · 0⤊ 0⤋
Hi. Amphibole.
2007-02-23 20:15:47 · answer #4 · answered by Cirric 7 · 0⤊ 0⤋
Its a naturally occuring mineral found in igneous rocks.
2007-02-23 20:08:14 · answer #5 · answered by Anonymous · 0⤊ 0⤋
It's a brand of tobacco for pipes I believe.
2007-02-23 20:13:18 · answer #6 · answered by monkeymanelvis 7 · 0⤊ 0⤋
some sort of powder to make or get you in the mood .... and
2007-02-23 20:13:31 · answer #7 · answered by misssmith_j 1 · 0⤊ 0⤋
hornblende is a mineral.
2007-02-23 20:21:39 · answer #8 · answered by anonymous 4 · 0⤊ 0⤋