UM1972-06-CO:CaK
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Formula:
K2Ca(CO3)2 · 4H2O
by analogy with associated baylissite
Colour:
Pale rose
Crystal System:
Orthorhombic
Composition is unique.
Accompanies grimselite, schröckingerite, monohydrocalcite, and baylissite, in the cable tunnel between Gerstenegg and Sommerloch, Grimsel area, Aar massif, Bern, Switzerland, in a place where granodiorite and aplite granite are cut by fissure veins and mineralized zones. Forms aggregates of acicular crystals.
Accompanies grimselite, schröckingerite, monohydrocalcite, and baylissite, in the cable tunnel between Gerstenegg and Sommerloch, Grimsel area, Aar massif, Bern, Switzerland, in a place where granodiorite and aplite granite are cut by fissure veins and mineralized zones. Forms aggregates of acicular crystals.
Unique Identifiers
Mindat ID:
47260
Long-form identifier:
mindat:1:1:47260:1
Physical Properties of UM1972-06-CO:CaK
Colour:
Pale rose
Optical Data of UM1972-06-CO:CaK
Type:
Biaxial (-)
RI values:
nα = 1.462 nβ = 1.531
Max. Birefringence:
δ = 0.000
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
Comments:
2V ca. 25o
Chemistry of UM1972-06-CO:CaK
Mindat Formula:
K2Ca(CO3)2 · 4H2O
by analogy with associated baylissite
by analogy with associated baylissite
Element Weights:
Common Impurities:
Mg,Fe
Crystallography of UM1972-06-CO:CaK
Crystal System:
Orthorhombic
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.11 Å | (90) |
| 3.20 Å | (100) |
| 2.90 Å | (80) |
| 2.37 Å | (50) |
| 2.3r Å | (50) |
| 1.917 Å | (50) |
Radioactivity
Other Information
Notes:
decomposed by water, dissolves in HCl
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 UM1972-06-CO:CaK
mindat.org URL:
https://www.mindat.org/min-47260.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for UM1972-06-CO:CaK
Reference List:
Localities for UM1972-06-CO:CaK
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.
Switzerland | |
| Walenta (1972) +1 other reference |
