Iron-bearing Saponite
A variety of Saponite
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Formula:
Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Colour:
Dark green
Lustre:
Vitreous, Dull
Hardness:
1
Originally reported from Santa Monica Mts, Los Angeles Co., California, USA.
See also the Fe-dominant end-member ferrosaponite.
See also the Fe-dominant end-member ferrosaponite.
Unique Identifiers
Mindat ID:
6980 (as Iron-bearing Saponite)
3528 (as Saponite)
3528 (as Saponite)
Long-form identifier:
mindat:1:1:6980:5 (as Iron-bearing Saponite)
mindat:1:1:3528:2 (as Saponite)
mindat:1:1:3528:2 (as Saponite)
Physical Properties of Iron-bearing Saponite
Optical Data of Iron-bearing Saponite
Type:
Biaxial (-)
RI values:
nα = 1.485 nβ = 1.565 nγ = 1.572
Max. Birefringence:
δ = 0.087
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Dispersion:
none
Chemistry of Iron-bearing Saponite
Mindat Formula:
Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Element Weights:
Synonyms of Iron-bearing Saponite
Other Language Names for Iron-bearing Saponite
German:Griffithit
Spanish:Griffithita
Common Associates
Associated Minerals Based on Photo Data:
| 1 photo of Iron-bearing Saponite associated with Chabazite-Na | (Na2,K2,Ca,Sr,Mg)2[Al2Si4O12]2 · 12H2O |
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 Iron-bearing Saponite
mindat.org URL:
https://www.mindat.org/min-6980.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Iron-bearing Saponite
Reference List:
Localities for Iron-bearing Saponite
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.
India | |
| AmMin 88:1983–1988 (2003) |
USA | |
| Wise et al. (1988) |
| Wise et al. (1988) +1 other reference | |
| Neuerberg et al. (1951) +4 other references |
| Neuerberg (1951) |
| Neuerberg (1951) +3 other references | |
| griffithite +2 other references | |