UM1990-88-SiO:BNa
This page is currently not sponsored. Click here to sponsor this page.
Formerly known as MSH UK53A. Hexagonal modification of UM1990-64-SiO:BNa.
Properties similar to the latter. Also found in sodalitic xenoliths.
Properties similar to the latter. Also found in sodalitic xenoliths.
Unique Identifiers
Mindat ID:
27633
Long-form identifier:
mindat:1:1:27633:5
Similar Names
| UM1990-64-SiO:BNa | NaBSiO4 |
Optical Data of UM1990-88-SiO:BNa
Type:
Uniaxial (-)
RI values:
nω = 1.588(1) nε = 1.578(1)
Max. Birefringence:
δ = 0.010
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 UM1990-88-SiO:BNa
Mindat Formula:
NaBSiO4
Element Weights:
Elements listed:
Crystallography of UM1990-88-SiO:BNa
Crystal System:
Hexagonal
Cell Parameters:
a = 8.036(3) Å, c = 7.709(3) Å
Ratio:
a:c = 1 : 0.959
Unit Cell V:
431.13 ų (Calculated from Unit Cell)
Comment:
Space group is P6m, P6 or P-6
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.02 Å | (40) |
| 3.858 Å | (60) |
| 3.564 Å | (50) |
| 2.782 Å | (100) |
| 2.321 Å | (50) |
| 2.222 Å | (70) |
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 UM1990-88-SiO:BNa
mindat.org URL:
https://www.mindat.org/min-27633.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
Mineral Dealers:
References for UM1990-88-SiO:BNa
Reference List:
