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Vladimirite

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About VladimiriteHide

Formula:
Ca4(AsO4)2(AsO3OH) · 4H2O
Colour:
Usually colorless to white, also pale rose
Lustre:
Sub-Vitreous, Silky, Pearly
Hardness:
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).


Classification of VladimiriteHide

Approved, 'Grandfathered' (first described prior to 1959)
8.CJ.25

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
20.2.10

20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba

Physical Properties of VladimiriteHide

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 VladimiriteHide

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
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v strong
Optical Extinction:
Z ^ c = 37°
Pleochroism:
Non-pleochroic

Chemical Properties of VladimiriteHide

Formula:
Ca4(AsO4)2(AsO3OH) · 4H2O

Crystallography of VladimiriteHide

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°
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.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.09 (40)
4.80 (40)
4.15 (80)
4.00 (80)
3.28 (80)
3.20 (40)
3.04 (60)
2.79 (100)
Comments:
ICDD 17-162

Type Occurrence of VladimiriteHide

Other Language Names for VladimiriteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Talmessite4 photos of Vladimirite associated with Talmessite on mindat.org.
Skutterudite1 photo of Vladimirite associated with Skutterudite on mindat.org.
Smolyaninovite1 photo of Vladimirite associated with Smolyaninovite on mindat.org.
Calcite1 photo of Vladimirite associated with Calcite on mindat.org.
Pharmacolite1 photo of Vladimirite associated with Pharmacolite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.CJ.CaesiumpharmacosideriteCsFe4[(AsO4)3(OH)4]·4H2OIso. 4 3m : P4 3m
8.CJ.05StercoriteNa(NH4)HPO4 · 4H2OTric.
8.CJ.10Mundrabillaite(NH4)2Ca(HPO4)2 · H2OMon. m : Pm
8.CJ.10Swaknoite(NH4)2Ca(HPO4)2 · H2OOrth.
8.CJ.15NabaphiteNaBaPO4 · 9H2OIso.
8.CJ.15NastrophiteNa(Sr,Ba)PO4 · 9H2O
8.CJ.20HaidingeriteCaHAsO4 · H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
8.CJ.30FerrarisiteCa5(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CJ.35Machatschkiite(Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2OHex.
8.CJ.40PhaunouxiteCa3(AsO4)2 · 11H2OTric.
8.CJ.40RauenthaliteCa3(AsO4)2 · 10H2OTric. 1 : P1
8.CJ.45Brockite(Ca,Th,Ce)PO4 · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Grayite(Th,Pb,Ca)(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Rhabdophane-(Ce)Ce(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Rhabdophane-(La)La(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Rhabdophane-(Nd)Nd(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Tristramite(Ca,U,Fe)(PO4,SO4) · 2H2OHex.
8.CJ.45Smirnovskite(Th,Ca)PO4 · nH2OHex. 6 2 2 : P62 2 2
8.CJ.50ArdealiteCa2(HPO4)(SO4) · 4H2OMon. m : Bb
8.CJ.50BrushiteCa(HPO4) · 2H2OMon. m : Bb
8.CJ.50Churchite-(Y)Y(PO4) · 2H2OMon. 2/m : B2/b
8.CJ.50PharmacoliteCa(HAsO4) · 2H2OMon. m
8.CJ.50Churchite-(Nd)Nd(PO4) · 2H2OMon.
8.CJ.55McneariteNaCa5(AsO4)(HAsO4)4 · 4H2OTric.
8.CJ.60DorfmaniteNa2HPO4 · 2H2OOrth.
8.CJ.65SincositeCa(VO)2(PO4)2 · 5H2OTet. 4/mmm (4/m 2/m 2/m) : P42/nnm
8.CJ.65BariosincositeBa(VO)2(PO4)2 · 4H2OTet.
8.CJ.70CatalanoiteNa2(HPO4) · 8H2OOrth. mmm (2/m 2/m 2/m) : Ibca
8.CJ.75GuériniteCa5(AsO4)2(HAsO4)2 · 9H2OMon. 2/m : P21/b
8.CJ.85NingyoiteCaU(PO4)2 · 1-2H2OOrth.

Related Minerals - Dana Grouping (8th Ed.)Hide

39.2.2.2GuériniteCa5(AsO4)2(HAsO4)2 · 9H2OMon. 2/m : P21/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.2.1BearsiteBe2(AsO4)(OH) · 4H2OMon.
20.2.2BrassiteMg(HAsO4) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
20.2.3RößleriteMg(HAsO4) · 7H2OMon. 2/m : B2/b
20.2.4HörnesiteMg3(AsO4)2 · 8H2OMon. 2/m : B2/m
20.2.5WeiliteCa(HAsO4)Tric. 1 : P1
20.2.6JohnbaumiteCa5(AsO4)3OHHex. 6/m : P63/m
20.2.7HaidingeriteCaHAsO4 · H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
20.2.8PharmacoliteCa(HAsO4) · 2H2OMon. m
20.2.9SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2OMon. 2/m : B2/b
20.2.11GuériniteCa5(AsO4)2(HAsO4)2 · 9H2OMon. 2/m : P21/b
20.2.12FerrarisiteCa5(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
20.2.13RauenthaliteCa3(AsO4)2 · 10H2OTric. 1 : P1
20.2.14PhaunouxiteCa3(AsO4)2 · 11H2OTric.
20.2.15McneariteNaCa5(AsO4)(HAsO4)4 · 4H2OTric.
20.2.16BergslagiteCaBeAsO4(OH)Mon. 2/m : P21/b
20.2.17AdeliteCaMg(AsO4)(OH)Orth. 2 2 2 : P21 21 21
20.2.18TalmessiteCa2Mg(AsO4)2 · 2H2OTric.
20.2.19IrhtemiteCa4Mg(AsO4)2(HAsO4)2 · 4H2OMon.
20.2.20CamgasiteCaMg(AsO4)(OH) · 5H2OMon. 2/m : P21/m
20.2.21PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2OTric. 1 : P1
20.2.22BariopharmacosideriteBa0.5Fe3+4(AsO4)3(OH)4 · 5H2OTet. 4 2m : P4 2m

Fluorescence of VladimiriteHide

Not fluorescent

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for VladimiriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1953): 82: 311-317.
Pierrot, R. (1964): Contribution à la minéralogie des arséniates calciques et calcomagnésiens naturels. Bull. Soc. fr. Minéral. Cristallogr. 87, 169-211.
American Mineralogist (1965): 50:813.
Yakhontova, L.K. & Stolyarova, T.I. (1970): New information on vladimirite. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 99, 362-364 (in Russian).
Catti, M. & Ivaldi, G. (1981) Mechanism of the reaction Ca5H2(AsO4)4•9H2O (ferrarisite) -> Ca5H2(AsO4)4•5H2O (dimorph of vladimirite) and structure of the latter phase. Z. Kristallogr., 157, 119-130.
Zeitschrift für Kristallographie (1981): 157: 296 [??] [structure]
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. Canadian Mineralogist, 49, 1055-1064.

Internet Links for VladimiriteHide

Localities for VladimiriteHide

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

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Chile
 
  • Atacama Region
    • Copiapó Province
      • Pabellón
        • Chinchado-Sacramento district
- 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. Canadian Mineralogist, 49, 1055-1064.
Germany
 
  • Hesse
    • Richelsdorf District
      • Bauhaus
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Nentershausen
        • Süß
          • Richelsdorf Smelter
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1992
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium; Lavreotiki Municipality)
      • Lavrion District Mines
        • Plaka
          • Plaka Mines
Kolitsch, U., Rieck, B., Brandstätter, F., Schreiber, F., Fabritz, K. H., Blaß, G. & Gröbner, J. (2014): Neufunde aus dem altem Bergbau und den Schlacken von Lavrion (I). Mineralien-Welt 25 (1), 60-75 (in German).
Fritz Schreiber collection
Morocco
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Tazenakht
        • Bou Azzer District (Bou Azer District)
          • Aït Ahmane
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68; 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. Canadian Mineralogist, 49, 1055-1064.
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Ightem
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68; Yakhontova L K, Stolyarova T I (1970) New information on vladimirite, Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 99, issue 3, 362-364
          • Méchoui
JP Barral collection
Russia (TL)
 
  • Eastern-Siberian Region
    • Tuva Republic
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Yakhontova L K, Stolyarova T I (1970) New information on vladimirite, Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 99, issue 3, 362-364
  • Western-Siberian Region
    • Altaiskii Krai
      • Gornyi Altai
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
USA
 
  • Michigan
    • Keweenaw Co.
      • Mohawk
[Mineralogical Record - Vol 23 No. 2]
  • Nevada
    • Nye Co.
      • Toquima Range
        • Manhattan District
          • Manhattan
Tony Nikischer specimen and analysis
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