UM1972-02-AsO:Ca
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Formula:
Ca-As-O
Colour:
Colourless
From Johann mine, as tabular crystals intergrown with gypsum and associated with camgasite.
Original paper suggest it to be, possibly, an arsenate analogue of ardealite, but Smith & Nickel (2007) correctly note, that is might rather be an arsenate analogue of rapidcreekite (similar PXRD).
Original paper suggest it to be, possibly, an arsenate analogue of ardealite, but Smith & Nickel (2007) correctly note, that is might rather be an arsenate analogue of rapidcreekite (similar PXRD).
Unique Identifiers
Mindat ID:
47255
Long-form identifier:
mindat:1:1:47255:9
Similar Names
| UM1983-02-As:Cu | Cu2As | |
| UM1993-01-AsO:CaH | Ca-As-O-H | |
| UM1997-10-AsO:CaV | Ca(VO)2(AsO4)2.4H2O | |
| UM1997-11-AsO:CuH | Cu-As-O-H | |
| UM1997-12-AsO:CuH | Cu-As-O-H | |
| UM2000-52-SO:Ag | ~Ag2SO4 | |
| UM2000-53-SO:Ag | ~Ag6(SO3)4O3 | |
| UM2003-25-Si:Ca | CaSi2 |
Physical Properties of UM1972-02-AsO:Ca
Colour:
Colourless
Optical Data of UM1972-02-AsO:Ca
Type:
Biaxial (+)
RI values:
nα = 1.513 nγ = 1.554
Max. Birefringence:
δ = 0.041
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
Dispersion:
r < v
Comments:
2V = 50o
Chemistry of UM1972-02-AsO:Ca
Mindat Formula:
Ca-As-O
Element Weights:
Elements listed:
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.86 Å | (100) |
| 4.32 Å | (70) |
| 3.89 Å | (60) |
| 3.11 Å | (70) |
| 2.80 Å | (60) |
| 1.903 Å | (50) |
Comments:
similar to rapidcreekite
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 UM1972-02-AsO:Ca
mindat.org URL:
https://www.mindat.org/min-47255.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for UM1972-02-AsO:Ca
Reference List:
Localities for UM1972-02-AsO:Ca
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.
Germany | |
| Walenta (1972) +1 other reference |
