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Hypersthene
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| Formula: |
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| Colour: | Greyish white | Hardness: | 5½ - 6 | |||||
Unnecessary name for member of Enstatite-Ferrosilite series; name discredited by the CNMMN Pyroxene Subcommittee (1988).
Regarded as a synonym of Enstatite or Ferrosilite, but commonly regarded as a mid-way member between these two end-members. Most "Hypersthene" is ferroan enstatite.
Visit gemdat.org for gemological information about Hypersthene. Currently in public beta-test.
Classification of Hypersthene | ||||||||
| IMA status: | Discredited | |||||||
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| mindat.org URL: | http://www.mindat.org/min-1995.html Please feel free to link to this page. | |||||||
Physical Properties of Hypersthene | ||||||||
| Lustre: | Vitreous, Silky | |||||||
| Colour: | Greyish white | |||||||
| Streak: | Greyish white greenish | |||||||
| Hardness (Mohs): | 5½ - 6 | |||||||
Optical Data of Hypersthene | ||||||||
| Type: | Biaxial (-) | |||||||
| RI values: | nα = 1.669 - 1.755 nβ = 1.674 - 1.763 nγ = 1.680 - 1.773 | |||||||
| 2V: | Measured: 70° to 90°, Calculated: 86° | |||||||
| Maximum Birefringence: | δ = 0.011 - 0.018 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. | |||||||
| Surface Relief: | High | |||||||
| Dispersion: | weak | |||||||
Chemical Properties of Hypersthene | ||||||||
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| Essential elements: | Mg, O, Si | |||||||
| All elements listed in formula: | Fe, Mg, O, Si | |||||||
Other Names for Hypersthene | ||||||||
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Other Information | ||||||||
| Health Warning: | No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care. | |||||||
References for Hypersthene | ||||||||
| Reference List: - + | Klaproth, M.H. (1810): Chemische Untersuchung des Hypersthens, Beiträge zur chemischen Kenntniss der Mineralkörper, Fünfter Band, Rottmann Berlin, 37-40 Mineralogical Magazine 52 (1988), 535. | |||||||
Internet Links for Hypersthene | ||||||||
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Localities for Hypersthene | ||||||||
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