UM1977-13-SiO:AlBaCaH
A material that is NOT an approved mineral species
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Formula:
(Ca,Ba)Al2Si3O10(OH)2.6
Hardness:
4½ - 5
Said to be a Ca analogue of edingtonite (formula?), but its PXRD pattern is way different. As polygonal grains in aggregates; also euhedral crystals with hexagonal and rhomboid cross section. Occurs in breccia-forming sulfide aqgregates in roof rocks in the Podol'skoye deposit; intergrown with sulfides (pyrite), and with relic albite and quartz. Abundant.
Unique Identifiers
Mindat ID:
47433
Long-form identifier:
mindat:1:1:47433:5
GUID
(UUID V4):
(UUID V4):
ca07e915-248b-4474-84e5-de8b2e7e494d
Physical Properties of UM1977-13-SiO:AlBaCaH
Hardness:
4½ - 5 on Mohs scale
Optical Data of UM1977-13-SiO:AlBaCaH
Type:
Biaxial (-)
RI values:
nα = 1.548 nγ = 1.550
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Max Birefringence:
δ = 0.002
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Colour in reflected light:
gray, dirty yellow, brownish pink, rarely colorless
Comments:
2V=53-55oC; twins seem to be uniaxial
Chemical Properties of UM1977-13-SiO:AlBaCaH
Formula:
(Ca,Ba)Al2Si3O10(OH)2.6
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.38 Å | (100) |
| 1.745 Å | (100) |
| 3.83 Å | (90) |
| 1.414 Å | (80) |
| 1.324 Å | (80) |
| 1.252 Å | (80) |
| 1.033 Å | (70-80) |
Comments:
does not resemble edingtonite at all
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.
References for UM1977-13-SiO:AlBaCaH
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Ismagilov, M.I. (1977): Calcium edingonite from pyrite deposits of the southern Urals. Doklady Earth Sci. Sect.: 234: l70-l72 (English trans. of Doklady Akad. Nauk SSSR: 234: 1445-1447 (1977)); in: Dunn, P.J., Fleischer, M., Langley, R.H., Shigley, J.E., Zilczer, J.A. (1985): New mineral names. American Mineralogist: 70: 878
Smith, D.G.W., Nickel, E.H. (2007): A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification. Canadian Mineralogist: 45: 983-1055; http://nrmima.nrm.se/Valid2009_03.pdf (2016)
Internet Links for UM1977-13-SiO:AlBaCaH
mindat.org URL:
https://www.mindat.org/min-47433.html
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Localities for UM1977-13-SiO:AlBaCaH
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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.
Russia | |
| Ismagilov, M.I. (1977): Calcium edingonite from pyrite deposits of the southern Urals. Doklady Earth Sci. Sect.: 234: l70-l72 (English trans. of Doklady Akad. Nauk SSSR: 234: 1445-1447 (1977)); in: Dunn, P.J., Fleischer, M., Langley, R.H., Shigley, J.E., Zilczer, J.A. (1985): New mineral names. American Mineralogist: 70: 878 |
