Classification of Ferroan Saponite |
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Physical Properties of Ferroan Saponite |
| Lustre: | Vitreous, Dull |
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| Colour: | Dark green |
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| Streak: | Green |
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| Hardness (Mohs): | 1 |
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Optical Data of Ferroan Saponite |
| Type: | Biaxial (-) |
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| RI values: | nα = 1.485 nβ = 1.565 nγ = 1.572 |
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| Maximum Birefringence: | δ = 0.087
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
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| Surface Relief: | Low |
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| Dispersion: | none |
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Other Names for Ferroan Saponite |
| Synonyms: | |
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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. |
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References for Ferroan Saponite |
| Reference List: | Larsen, E.S. & G. Steiger (1917), Mineralogical notes: griffithite, a new member of the chlorite group, Washington Acad. Sci. Jour.: 7: 6-12.
Larsen, Esper Signius & George Steiger (1928), Dehydration and optical studies of alunogen, nontronite, and griffithite: Am. Jour. Sci., 5th. series: 15: 1-19. |
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Internet Links for Ferroan Saponite |
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Localities for Ferroan Saponite |
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the  symbol to view information about a locality.
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