Humite: Difference between revisions
Tassedethe (talk | contribs) m WikiCleaner 0.99 - Repairing link to disambiguation page - You can help! |
|||
| Line 2: | Line 2: | ||
'''Humite''' is an [[orthorhombic]] mineral of a transparent vitreous brown to orange color. It is found in the [[volcanic]]ally ejected masses of [[Vesuvius]]. It is a [[Silicate minerals|nesosilicate]] of [[iron]] and [[magnesium]] which also contains [[fluorine]] and [[hydroxide]]. The formula is: ([[magnesium|Mg]],[[iron|Fe]])<sub>7</sub>([[silicon|Si]][[oxygen|O]]<sub>4</sub>)<sub>3</sub>([[fluorine|F]],O[[hydrogen|H]])<sub>2</sub>. |
'''Humite''' is an [[orthorhombic]] mineral of a transparent vitreous brown to orange color. It is found in the [[volcanic]]ally ejected masses of [[Vesuvius]]. It is a [[Silicate minerals|nesosilicate]] of [[iron]] and [[magnesium]] which also contains [[fluorine]] and [[hydroxide]]. The formula is: ([[magnesium|Mg]],[[iron|Fe]])<sub>7</sub>([[silicon|Si]][[oxygen|O]]<sub>4</sub>)<sub>3</sub>([[fluorine|F]],O[[hydrogen|H]])<sub>2</sub>. |
||
It was first described in 1813 and named for [[Abraham Hume]] (1749-1838). |
It was first described in 1813 and named for [[Sir Abraham Hume, 2nd Baronet|Abraham Hume]] (1749-1838). |
||
Humite is also used as the name of a group of closely related minerals -- humite, [[clinohumite]], [[chondrodite]], and [[norbergite]]. These minerals are similar in structure and in chemistry. Deer et al. (1997) note that a general formula for the humite-group minerals can be simply expressed as nM<sub>2</sub>SiO<sub>4</sub> . M(OH,F)<sub>2</sub> , where M is Mg, Fe, Ti etc. and n = 1 (norbergite), 2 (chondrodite), 3 (humite), and 4 (clinohumite). Deer et al. (1997) also note that although the formula above correctly describes the chemistries of these minerals, structural formulas are more complex. |
Humite is also used as the name of a group of closely related minerals -- humite, [[clinohumite]], [[chondrodite]], and [[norbergite]]. These minerals are similar in structure and in chemistry. Deer et al. (1997) note that a general formula for the humite-group minerals can be simply expressed as nM<sub>2</sub>SiO<sub>4</sub> . M(OH,F)<sub>2</sub> , where M is Mg, Fe, Ti etc. and n = 1 (norbergite), 2 (chondrodite), 3 (humite), and 4 (clinohumite). Deer et al. (1997) also note that although the formula above correctly describes the chemistries of these minerals, structural formulas are more complex. |
||
Revision as of 09:28, 25 July 2010
Humite is an orthorhombic mineral of a transparent vitreous brown to orange color. It is found in the volcanically ejected masses of Vesuvius. It is a nesosilicate of iron and magnesium which also contains fluorine and hydroxide. The formula is: (Mg,Fe)7(SiO4)3(F,OH)2.
It was first described in 1813 and named for Abraham Hume (1749-1838).
Humite is also used as the name of a group of closely related minerals -- humite, clinohumite, chondrodite, and norbergite. These minerals are similar in structure and in chemistry. Deer et al. (1997) note that a general formula for the humite-group minerals can be simply expressed as nM2SiO4 . M(OH,F)2 , where M is Mg, Fe, Ti etc. and n = 1 (norbergite), 2 (chondrodite), 3 (humite), and 4 (clinohumite). Deer et al. (1997) also note that although the formula above correctly describes the chemistries of these minerals, structural formulas are more complex.
See also
References
- Deer, W. A., Howie, R. A., and Zussman, J., 1997, Rock-forming minerals: Volume 1A, Second Edition, Orthosilicates. The Geological Society, Bath, UK. ISBN 1-897799-8-8
External links
 | This article about a specific silicate mineral is a stub. You can help Wikipedia by expanding it. |