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Clinochesterite
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Formula:
(Mg,Fe)17Si20O54(OH)6
Crystal System:
Monoclinic
Name:
For its structural difference from chesterite.
Dimorph of:
A biopyribole mineral. The current correct name is UM1978-22-SiO:FeHMg (see the synonym). For all four similar biopyriboles (chesterite, jimthompsonite, clinojimthompsonite and "clinochesterite"): physical and optical properties similar to those of Ca-low amphiboles; cleavage angles lower than those of amphiboles; chemically intermediate between anthopyllite and talc.
Unique Identifiers
Mindat ID:
31326
Long-form identifier:
mindat:1:1:31326:5
Chemistry of Clinochesterite
Mindat Formula:
(Mg,Fe)17Si20O54(OH)6
Element Weights:
Crystallography of Clinochesterite
Crystal System:
Monoclinic
Cell Parameters:
a = 9.78 Å, b = 45.3 Å, c = 5.29 Å
β = 109.78°
β = 109.78°
Ratio:
a:b:c = 0.216 : 1 : 0.117
Unit Cell V:
2,205.37 ų (Calculated from Unit Cell)
Comment:
Space group is A2/m, A2 or Am; all data for UM1978-22-SiO:FeHMg
Synonyms of Clinochesterite
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Clinochesterite
mindat.org URL:
https://www.mindat.org/min-31326.html
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References for Clinochesterite
Reference List:
Veblen, David R., Burnham, Charles W. (1978) New biopyriboles from Chester, Vermont: I. Descriptive mineralogy. American Mineralogist, 63 (9-10) 1000-1009
Ahn, Jung Ho, Cho, Moonsup, Jenkins, David M., Buseck, Peter R. (1991) Structural defects in synthetic tremolitic amphiboles. American Mineralogist, 76 (11-12) 1811-1823
Droop, G. T. R. (1994) Triple-chain pyriboles in Lewisian ultramafic rocks. Mineralogical Magazine, 58 (390) 1-20 doi:10.1180/minmag.1994.058.390.01
Localities for Clinochesterite
Showing 3 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Japan | |
| Konishi (1992) |
| Konishi et al. (1993) +1 other reference |
UK | |
| Droop (1994) |
