UM1958-03-SiO:AlCaFeKNa
A material that is NOT an approved mineral species
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Formula:
(K,Na)4Ca2(Al,Fe)(Si,Al)6(O,OH,F)18 · 0.6NaCl
Colour:
Gray
Lustre:
Vitreous, Pearly
Hardness:
4
Crystal System:
Orthorhombic
Reported as "mineral no. 3". Chemically somewhat similar to umbrianite and quadridavyne. See also 'UM1958-04-SiO:AlHK'.
Finely foliated; replaced by pectolite.
Finely foliated; replaced by pectolite.
Unique Identifiers
Mindat ID:
47089
Long-form identifier:
mindat:1:1:47089:8
Physical Properties of UM1958-03-SiO:AlCaFeKNa
Vitreous, Pearly
Colour:
Gray
Comment:
Greenish-gray if aegirine inclusions are present
Hardness:
4 on Mohs scale
Comment:
Ca. 4
Tenacity:
Brittle
Cleavage:
Perfect
Optical Data of UM1958-03-SiO:AlCaFeKNa
Type:
Biaxial (+)
RI values:
nα = 1.529 nβ = 1.531 nγ = 1.532
2V:
Measured: 29°
Max. Birefringence:
δ = 0.004
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 UM1958-03-SiO:AlCaFeKNa
Mindat Formula:
(K,Na)4Ca2(Al,Fe)(Si,Al)6(O,OH,F)18 · 0.6NaCl
Element Weights:
Crystallography of UM1958-03-SiO:AlCaFeKNa
Crystal System:
Orthorhombic
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.077 Å | (100) |
| 2.904 Å | (90) |
| 3.474 Å | (80) |
| 2.477 Å | (70) |
| 1.928 Å | (70) |
| 1.864 Å | (70) |
| 1.769 Å | (70) |
| 1.532 Å | (60) |
Comments:
Some lines match the PXRD pattern of pectolite
Radioactivity
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 UM1958-03-SiO:AlCaFeKNa
mindat.org URL:
https://www.mindat.org/min-47089.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for UM1958-03-SiO:AlCaFeKNa
Reference List:
Localities for UM1958-03-SiO:AlCaFeKNa
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.
Russia | |
| Dorfman (1958) +1 other reference |