Švenekite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Švenekite
Jaroslav Švenek
Formula:
Ca(H2AsO4)2
Colour:
Colourless, white
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
3.16
Crystal System:
Triclinic
Name:
Named in honour of Jaroslav Švenek (1927-1994), the former curator of the mineralogical collection of the National Museum in Prague, Czech Republic.
Well-known as a synthetic compound.
Unique Identifiers
Mindat ID:
7076
Long-form identifier:
mindat:1:1:7076:4
GUID
(UUID V4):
(UUID V4):
b550f9e6-a2fe-48f5-8631-1955416d346f
IMA Classification of Švenekite
Approved
IMA Formula:
Ca[AsO2(OH)2]2
Approval year:
1999
First published:
2013
Type description reference:
Ondruš, P., Skála, R., Plášil, J., Sejkora, J., Veselovský, F., Čejka, J., Kallistová, A., Hloušek, J., Fejfarová, K., Škoda, R., Dušek, M., Gabašová, A., Machovič, V., Lapčák, L. (2013) Švenekite, Ca[AsO2(OH)2]2, a new mineral from Jáchymov, Czech Republic. Mineralogical Magazine, 77 (6) 2711-2724 doi:10.1180/minmag.2013.077.6.02
Classification of Švenekite
8.AD.10
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
Dana 7th ed.:
37.1.6.1
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Švn | 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 Švenekite
Vitreous
Transparency:
Transparent, Translucent
Colour:
Colourless, white
Streak:
White
Hardness:
2 on Mohs scale
Tenacity:
Brittle
Cleavage:
Very Good
very good cleavage on {010}
very good cleavage on {010}
Fracture:
Irregular/Uneven
Density:
3.16(1) g/cm3 (Measured) 3.26 g/cm3 (Calculated)
Optical Data of Švenekite
Type:
Biaxial
RI values:
nα = 1.602(2) nγ = 1.658(2)
Max Birefringence:
δ = 0.056
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Non-pleochroic
Chemistry of Švenekite
Mindat Formula:
Ca(H2AsO4)2
Elements listed:
Crystallography of Švenekite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 8.5482(3) Å, b = 7.6973 Å, c = 5.7198 Å
α = 92.59°, β = 109.87°, γ = 109.92°
α = 92.59°, β = 109.87°, γ = 109.92°
Ratio:
a:b:c = 1.111 : 1 : 0.743
Unit Cell V:
332.44 ų
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.968 Å | (33) |
| 3.766 Å | (35) |
| 3.697 Å | (49) |
| 3.554 Å | (100) |
| 3.259 Å | (33) |
| 3.097 Å | (49) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Švenekite
General Appearance of Type Material:
Coatings composed of indistinct radiating to rosette-shaped aggregates up to 3 mm across with a glassy luster, but also white botryoidal crusts with a matte or lustrous surface. The rosettes are composed of thin lens- to blade-shaped crystals, usually 100
Place of Conservation of Type Material:
Mineral collection of the National Museum in Prague, Czech Republic
Geological Setting of Type Material:
Occurs as a supergene mineral that grows directly on granite rocks isolated from other arsenates, which are common in Jáchymov. The mineral crystallized from concentrated strongly acidic solution with a strong circulation, which carried arsenic acid produced by decomposition of native arsenic or arsenides common in the Geschieber vein.
Reference:
Ondruš, P., Skála, R., Plášil, J., Sejkora, J., Veselovský, F., Čejka, J., Kallistová, A., Hloušek, J., Fejfarová, K., Škoda, R., Dušek, M., Gabašová, A., Machovič, V., Lapčák, L. (2013) Švenekite, Ca[AsO2(OH)2]2, a new mineral from Jáchymov, Czech Republic. Mineralogical Magazine: 77: 2711-2724.
Synonyms of Švenekite
Other Language Names for Švenekite
German:Švenekit
Common Associates
Related Minerals - Strunz-mindat Grouping
| 8.AD. | Keplerite | Ca9(Ca0.5◻0.5)Mg(PO4)7 |
| 8.AD. | Deynekoite | Ca9◻Fe3+(PO4)7 |
| 8.AD. | Mazorite | Ba3(PO4)2 |
| 8.AD. | Monazite-(Gd) | Gd(PO4) |
| 8.AD.05 | Nahpoite | Na2(PO3OH) |
| 8.AD.10 | Monetite | Ca(PO3OH) |
| 8.AD.10 | Weilite | Ca(HAsO4) |
| 8.AD.15 | Archerite | (K,NH4)(H2PO4) |
| 8.AD.15 | Biphosphammite | NH4(H2PO4) |
| 8.AD.20 | Phosphammite | (NH4)2(PO3OH) |
| 8.AD.25 | Buchwaldite | NaCa(PO4) |
| 8.AD.30 | Schultenite | Pb(HAsO4) |
| 8.AD.35 | Chernovite-(Y) | Y(AsO4) |
| 8.AD.35 | Dreyerite | Bi(VO4) |
| 8.AD.35 | Wakefieldite-(Ce) | Ce(VO4) |
| 8.AD.35 | Wakefieldite-(Y) | Y(VO4) |
| 8.AD.35 | Xenotime-(Y) | Y(PO4) |
| 8.AD.35 | Chernovite-(Ce) | (Ce,Y)(AsO4) |
| 8.AD.35 | Pretulite | Sc(PO4) |
| 8.AD.35 | Xenotime-(Yb) | Yb(PO4) |
| 8.AD.35 | Wakefieldite-(La) | La(VO4) |
| 8.AD.35 | Wakefieldite-(Nd) | Nd(VO4) |
| 8.AD.35 | Xenotime-(Gd) | Gd(PO4) |
| 8.AD.40 | Pucherite | Bi(VO4) |
| 8.AD.45 | Ximengite | Bi(PO4) |
| 8.AD.50 | Gasparite-(Ce) | Ce(AsO4) |
| 8.AD.50 | Monazite-(Ce) | Ce(PO4) |
| 8.AD.50 | Monazite-(La) | La(PO4) |
| 8.AD.50 | Monazite-(Nd) | Nd(PO4) |
| 8.AD.50 | Rooseveltite | Bi(AsO4) |
| 8.AD.50 | Cheralite | CaTh(PO4)2 |
| 8.AD.50 | Monazite-(Sm) | Sm(PO4) |
| 8.AD.50 | UM2005-35-VO:CaFePSiTh | (Th,Ca)(VO4,SiO4,PO4) |
| 8.AD.50 | Gasparite-(La) | La(AsO4) |
| 8.AD.55 | Tetrarooseveltite | Bi(AsO4) |
| 8.AD.60 | Chursinite | [Hg2]2+Hg2+2[AsO4]2 |
| 8.AD.65 | Clinobisvanite | Bi(VO4) |
| 8.AD.70 | Gurimite | Ba3(VO4)2 |
| 8.AD.75 | Picaite | NaCa[AsO3OH][AsO2(OH)2] |
Fluorescence of Švenekite
none
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 Švenekite
mindat.org URL:
https://www.mindat.org/min-7076.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Švenekite
Reference List:
Ondruš, P., Veselovský, F., Skála, R., Cisařová, I., Hloušek, J., Frýda, J., Vavřín, I., Čejka, J., Gabašová, A. (1997) New naturally occurring phases of secondary origin from Jáchymov (Joachimsthal) Journal of the Czech Geological Society, 42 (4) 77-108 [as unnamed phase]
Ondruš, P., Skála, R., Plášil, J., Sejkora, J., Veselovský, F., Čejka, J., Kallistová, A., Hloušek, J., Fejfarová, K., Škoda, R., Dušek, M., Gabašová, A., Machovič, V., Lapčák, L. (2013) Švenekite, Ca[AsO2(OH)2]2, a new mineral from Jáchymov, Czech Republic. Mineralogical Magazine, 77 (6) 2711-2724 doi:10.1180/minmag.2013.077.6.02
Localities for Švenekite
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.
Czech Republic | |
| [AmMin 84:687] |
| Ondruš et al. (2013) +1 other reference |
Quick NavTopAbout ŠvenekiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic