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UM1995-14-N:Si
Valid as an unnamed mineral
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The beta polymorph of nierite. Coexists with it in acid-resistant residues of few meteorites.
As sharply-defined epitaxial intergrowths with nierite; less abundant than it.
Six d-spacing values are given based on SAED.
As sharply-defined epitaxial intergrowths with nierite; less abundant than it.
Six d-spacing values are given based on SAED.
Unique Identifiers
Mindat ID:
53552
Long-form identifier:
mindat:1:1:53552:0
Similar Names
| UM1982-06-C:Si | ~Si3C4 | |
| UM1990-09-C:Si | β-SiC | |
| UM2007-16-N:Ti | Valid as an unnamed mineral | Ti7N3 |
IMA Classification of UM1995-14-N:Si
IMA status notes:
Unnamed (probably valid)
Optical Data of UM1995-14-N:Si
Type:
Uniaxial (+)
RI values:
nω = 2.02 nε = 2.04
Max. Birefringence:
δ = 0.020
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
Chemistry of UM1995-14-N:Si
Mindat Formula:
β-Si3N4
Elements listed:
Crystallography of UM1995-14-N:Si
Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Setting:
P63/m
Cell Parameters:
a = 7.603 Å, c = 2.909 Å
Ratio:
a:c = 1 : 0.383
Unit Cell V:
145.63 ų (Calculated from Unit Cell)
Z:
2
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 UM1995-14-N:Si
mindat.org URL:
https://www.mindat.org/min-53552.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for UM1995-14-N:Si
Reference List:
Lee, Martin R., Russell, Sara S., Arden, John W., Pillinger, C. T. (1995) Nierite (Si3N4), a new mineral from ordinary and enstatite chondrites. Meteoritics, 30 (4) 387-398 doi:10.1111/j.1945-5100.1995.tb01142.x(Abs. in: Jambor, J.L., Pertsev, N.N., Roberts, A.C. (1996): New mineral names. American Mineralogist: 81: 253)
Localities for UM1995-14-N:Si
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.
Azerbaijan | |
| Lee et al. (1995) +1 other reference |
Czech Republic | |
| Lee et al. (1995) +1 other reference |
USA | |
| Lee et al. (1995) +1 other reference |
