Calciolangbeinite (original) (raw)
A valid IMA mineral species
About CalciolangbeiniteHide
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Name:
Name as being the Ca-analogue of langbeinite.
Chemically similar to 'Unnamed (Potassium Calcium Sulfate)'. The Ca analogue of langbeinite.
Forms a solid solution with the latter. The content of 20 mol%, or more, of the langbeinite end-member induces breakdown into cubic lower-magnesian calciolangbeinite and langbeinite, upon slow cooling.
The calciolangbeinite-O (low-temperature) polymorph, although topologically similar to calciolangbeinite-C (probably stabilized by Mg admixture), is "the first natural orthorhombic langbeinite-like sulfate".
Note: the original (first-described) material was the cubic polymorph.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:42383:6
ac669f51-70bb-4596-9ea9-bdec733697c0
IMA Classification of CalciolangbeiniteHide
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Type description reference:
Pekov, I. V., Zelenski, M. E., Zubkova, N. V., Yapaskurt, V. O., Chukanov, N. V., Belakovskiy, D. I., Pushcharovsky, D. Y. (2012) Calciolangbeinite, K2Ca2(SO4)3, a new mineral from the Tolbachik volcano, Kamchatka, Russia. Mineralogical Magazine, 76 (3) 673-682 doi:10.1180/minmag.2012.076.3.16
Classification of CalciolangbeiniteHide
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7.AD.
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
D : With only large cations
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Clgb | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of CalciolangbeiniteHide
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Density:
2.68(2) g/cm3 (Measured) 2.74 g/cm3 (Calculated)
Optical Data of CalciolangbeiniteHide
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Birefringence:
Isotropic minerals have no birefringence
Chemistry of CalciolangbeiniteHide
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Mindat Formula:
K2Ca2(SO4)3
Crystallography of CalciolangbeiniteHide
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Polytype:
Formula:
Crystal System:
Class (H-M)
Space Group:
Space Group Setting:
Cell Parameters:
Ratio:
Unit Cell Volume (calc):
Z:
| Calciolangbeinite-C | Calciolangbeinite-O |
|---|---|
| Isometric | Orthorhombic |
| 23 - Tetartoidal | 222 - Disphenoidal |
| _P_213 | _P_212121 |
| a = 10.1887(4) Å | a = 10.3330(2) Å, b = 10.5027(2) Å, c = 10.1763(2) Å |
| a:b:c = 0.984 : 1 : 0.969 | |
| V 1057.68 ų | V 1104.37 ų |
| 4 | 4 |
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.84 Å | (8) |
| 4.54 Å | (9) |
| 4.15 Å | (27) |
| 3.218 Å | (100) |
| 2.838 Å | (8) |
| 2.736 Å | (37) |
| 2.006 Å | (11) |
| 1.658 Å | (8) |
Geological EnvironmentHide
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Type Occurrence of CalciolangbeiniteHide
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General Appearance of Type Material:
Crystals and almost anhedral grains, typically up to 0.5 mm, and rarely up to 1 mm across.
Place of Conservation of Type Material:
Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia under registration number 4153/1.
Geological Setting of Type Material:
Associated Minerals at Type Locality:
Reference:
Pekov, I.V., Zelenski, M.E., Zubkova, N.V., Yapaskurt, V.O., Chukanov, N.V., Belakovskiy, D.I., Pushcharovsky, D.Yu. (2012) Calciolangbeinite, K2Ca2(SO4)3, a new mineral from the Tolbachik volcano, Kamchatka, Russia. Mineralogical Magazine: 76(3): 673–682.
Synonyms of CalciolangbeiniteHide
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Relationship of Calciolangbeinite to other SpeciesHide
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Other Members of this group:
Related Minerals - Strunz-mindat GroupingHide
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Fluorescence of CalciolangbeiniteHide
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Other InformationHide
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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 CalciolangbeiniteHide
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References for CalciolangbeiniteHide
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Reference List:
Pekov, I. V., Zelenski, M. E., Zubkova, N. V., Yapaskurt, V. O., Chukanov, N. V., Belakovskiy, D. I., Pushcharovsky, D. Y. (2012) Calciolangbeinite, K2Ca2(SO4)3, a new mineral from the Tolbachik volcano, Kamchatka, Russia. Mineralogical Magazine, 76 (3) 673-682 doi:10.1180/minmag.2012.076.3.16
Pekov, Igor V., Zubkova, Natalia V., Galuskina, Irina O., Kusz, Joachim, Koshlyakova, Natalia N., Galuskin, Evgeny V., Belakovskiy, Dmitry I., Bulakh, Maria O., Vigasina, Marina F., Chukanov, Nikita V., Britvin, Sergey N., Sidorov, Evgeny G., Vapnik, Yevgeny, Pushcharovsky, Dmitry Yu. (2022) Calciolangbeinite-O, a natural orthorhombic modification of K2Ca2(SO4)3, and the langbeinite–calciolangbeinite solid-solution system. Mineralogical Magazine, 86 (4) 557-569 doi:10.1180/mgm.2021.95
Localities for CalciolangbeiniteHide
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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Locality ListHide
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- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.