Vladimirite
A valid IMA mineral species - grandfathered
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About Vladimirite
Formula:
Ca4(AsO4)2(AsO3OH) · 4H2O
Colour:
Usually colorless to white, also pale rose
Lustre:
Sub-Vitreous, Silky, Pearly
Hardness:
3½
Specific Gravity:
3.12 - 3.15
Crystal System:
Monoclinic
Name:
Named by E. I. Nefedov in 1953 after its discovery locality, Vladimirskoe deposit, Khovu-Aksy, Tuva Republic, Russia.
The originally proposed formula Ca5(AsO4)2(HAsO4)2.5H2O was revised by the work of Yang et al. (2011).
A triclinic compound with the formula Ca5(AsO4)2(HAsO4)2.5H2O was obtained by dehydration of ferrarisite (Catti & Ivaldi, 1981).
A triclinic compound with the formula Ca5(AsO4)2(HAsO4)2.5H2O was obtained by dehydration of ferrarisite (Catti & Ivaldi, 1981).
Unique Identifiers
Mindat ID:
4195
Long-form identifier:
mindat:1:1:4195:5
IMA Classification of Vladimirite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1953
Classification of Vladimirite
8.CJ.25
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
39.2.2.1
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
2 : (AB)5[HXO4]2[XO4]2.xH2O
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
2 : (AB)5[HXO4]2[XO4]2.xH2O
20.2.10
20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba
20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba
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 |
|---|---|---|
| Vld | 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 Vladimirite
Sub-Vitreous, Silky, Pearly
Transparency:
Transparent, Translucent
Colour:
Usually colorless to white, also pale rose
Streak:
White
Hardness:
3½ on Mohs scale
Tenacity:
Brittle
Density:
3.12 - 3.15 g/cm3 (Measured) 3.17 g/cm3 (Calculated)
Optical Data of Vladimirite
Type:
Biaxial (-)
RI values:
nα = 1.650 - 1.651 nβ = 1.654 - 1.656 nγ = 1.656 - 1.661
2V:
Measured: 70° , Calculated: 76° to 84°
Birefringence:
0.008
Max. Birefringence:
δ = 0.006 - 0.010
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 strong
Optical Extinction:
Z ^ c = 37°
Pleochroism:
Non-pleochroic
Chemistry of Vladimirite
Mindat Formula:
Ca4(AsO4)2(AsO3OH) · 4H2O
Element Weights:
Elements listed:
Crystallography of Vladimirite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 5.81 Å, b = 10.19 Å, c = 22.7 Å
β = 97.32°
β = 97.32°
Ratio:
a:b:c = 0.57 : 1 : 2.228
Unit Cell V:
1,332.98 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Acicular to bladed crystals in open radial clusters.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0018559 | Vladimirite | Yang H, Evans S H, Downs R T, Jenkins R A (2011) The crystal structure of vladimirite, with a revised chemical formula, Ca4(AsO4)2(AsO3OH)*4H2O The Canadian Mineralogist 49 1055-1064 | 2011 | Corbriza mine, Copiapo, Chile | 0 | 293 | |
| 0018560 | Vladimirite | Yang H, Evans S H, Downs R T, Jenkins R A (2011) The crystal structure of vladimirite, with a revised chemical formula, Ca4(AsO4)2(AsO3OH)*4H2O The Canadian Mineralogist 49 1055-1064 | 2011 | Ait Ahmane vein No. 53, Bou Azzer district, Morroco | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.09 Å | (40) |
| 4.80 Å | (40) |
| 4.15 Å | (80) |
| 4.00 Å | (80) |
| 3.28 Å | (80) |
| 3.20 Å | (40) |
| 3.04 Å | (60) |
| 2.79 Å | (100) |
Comments:
ICDD 17-162
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] | |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 55 : Anthropogenic mine minerals |
Type Occurrence of Vladimirite
Co-Type Localities:
General Appearance of Type Material:
Acicular, radial aggregates.
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Moscow, Russia, number 57263 (type).
Mining Museum, St. Petersburg, Russia, number 1220/1 (type).
Mining Museum, St. Petersburg, Russia, number 1220/1 (type).
Other Language Names for Vladimirite
Common Associates
Associated Minerals Based on Photo Data:
| 12 photos of Vladimirite associated with Talmessite | Ca2Mg(AsO4)2 · 2H2O |
| 10 photos of Vladimirite associated with Calcite | CaCO3 |
| 7 photos of Vladimirite associated with Irhtemite | Ca4Mg(AsO4)2(HAsO4)2 · 4H2O |
| 7 photos of Vladimirite associated with Erythrite | Co3(AsO4)2 · 8H2O |
| 6 photos of Vladimirite associated with Sainfeldite | Ca5(AsO4)2(AsO3OH)2 · 4H2O |
| 6 photos of Vladimirite associated with Hörnesite | Mg3(AsO4)2 · 8H2O |
| 1 photo of Vladimirite associated with Skutterudite | CoAs3 |
| 1 photo of Vladimirite associated with Pharmacolite | Ca(HAsO4) · 2H2O |
| 1 photo of Vladimirite associated with Smolyaninovite | Co3Fe3+2(AsO4)4 · 11H2O |
Related Minerals - Strunz-mindat Grouping
| 8.CJ. | Airdite | Sr(V4+O)2(PO4)2 · 4H2O |
| 8.CJ. | Dobšináite | Ca2Ca(AsO4)2 · 2H2O |
| 8.CJ. | Sainfeldite | Ca5(AsO4)2(AsO3OH)2 · 4H2O |
| 8.CJ. | Caesiumpharmacosiderite | CsFe4[(AsO4)3(OH)4] · 4H2O |
| 8.CJ. | Jeankempite | Ca5(AsO4)2(HAsO4)2 · 7H2O |
| 8.CJ.05 | Stercorite | (NH4)Na(PO3OH) · 4H2O |
| 8.CJ.10 | Swaknoite | (NH4)2Ca(PO3OH)2 · H2O |
| 8.CJ.10 | Mundrabillaite | (NH4)2Ca(PO3OH)2 · H2O |
| 8.CJ.15 | Nabaphite | NaBaPO4 · 9H2O |
| 8.CJ.15 | Nastrophite | Na(Sr,Ba)PO4 · 9H2O |
| 8.CJ.20 | Haidingerite | CaHAsO4 · H2O |
| 8.CJ.25 | Rhabdophane-(Y) | YPO4 · H2O |
| 8.CJ.27 | Churchite-(Dy) | (Dy,Sm,Gd,Nd)PO4 · 2H2O |
| 8.CJ.30 | Ferrarisite | Ca5(AsO4)2(HAsO4)2 · 9H2O |
| 8.CJ.35 | Fulbrightite | Ca(VO)2(AsO4)2 · 4H2O |
| 8.CJ.35 | Machatschkiite | (Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2O |
| 8.CJ.40 | Rauenthalite | Ca3(AsO4)2 · 10H2O |
| 8.CJ.40 | Phaunouxite | Ca3(AsO4)2 · 11H2O |
| 8.CJ.45 | Brockite | (Ca,Th,Ce)PO4 · H2O |
| 8.CJ.45 | Smirnovskite | (Th,Ca)PO4 · nH2O |
| 8.CJ.45 | Rhabdophane-(Ce) | Ce(PO4) · 0.6H2O |
| 8.CJ.45 | Rhabdophane-(La) | La(PO4) · H2O |
| 8.CJ.45 | Rhabdophane-(Nd) | Nd(PO4) · H2O |
| 8.CJ.45 | Tristramite | (Ca,U,Fe)(PO4,SO4) · 2H2O |
| 8.CJ.45 | Grayite | (Th,Pb,Ca)(PO4) · H2O |
| 8.CJ.45 | Štěpite | U(AsO3OH)2 · 4H2O |
| 8.CJ.47 | Vysokýite | U4+[AsO2(OH)2]4 · 4H2O |
| 8.CJ.50 | Churchite-(Y) | Y(PO4) · 2H2O |
| 8.CJ.50 | Brushite | Ca(PO3OH) · 2H2O |
| 8.CJ.50 | Ardealite | Ca2(PO3OH)(SO4) · 4H2O |
| 8.CJ.50 | Pharmacolite | Ca(HAsO4) · 2H2O |
| 8.CJ.50 | Churchite-(Nd) | Nd(PO4) · 2H2O |
| 8.CJ.55 | Mcnearite | NaCa5(AsO4)(HAsO4)4 · 4H2O |
| 8.CJ.60 | Dorfmanite | Na2(PO3OH) · 2H2O |
| 8.CJ.65 | Sincosite | Ca(VO)2(PO4)2 · 5H2O |
| 8.CJ.65 | Bariosincosite | Ba(VO)2(PO4)2 · 4H2O |
| 8.CJ.70 | Catalanoite | Na2(PO3OH) · 8H2O |
| 8.CJ.75 | Guérinite | Ca6(HAsO4)3(AsO4)2 · 10.5H2O |
| 8.CJ.85 | Ningyoite | (U,Ca,Ce)2(PO4)2 · 1-2H2O |
Fluorescence of Vladimirite
Not fluorescent
Other Information
Thermal Behaviour:
Fusible with difficulty.
Notes:
Soluble in acids.
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 Vladimirite
mindat.org URL:
https://www.mindat.org/min-4195.html
Please feel free to link to this page.
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References for Vladimirite
Reference List:
Pierrot, Roland (1964) Contribution à la minéralogie des arséniates calciques et calcomagnésiens naturels. Bulletin de Minéralogie, 87 (2) 169-211 doi:10.3406/bulmi.1964.5727
Localities for Vladimirite
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.
Chile | |
| Yang et al. (2011) |
Germany | |
| Weiß (1990) |
| Weiß (1990) | |
Greece | |
| Kolitsch et al. (2014) |
| Fritz Schreiber collection | |
Morocco | |
| JP Barral collection |
| Favreau et al. (2006) |
| Favreau et al. (2006) | |
| Favreau et al. (2006) +1 other reference | |
| Favreau (n.d.) | |
| Favreau et al. (2006) | |
| Yakhontova L K (1970) +1 other reference |
Russia (TL) | |
| Pekov (1998) |
| Yakhontova L K (1970) +1 other reference |
USA | |
| Wilson et al. (1992) |
| Tony Nikischer specimen and analysis |
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Ightem Mine, Ightem, Tansifte Caïdat, Agdz Cercle, Zagora Province, Drâa-Tafilalet Region, Morocco