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Rauenthalite

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Formula:
Ca3(AsO4)2 · 10H2O
Colour:
Colorless, white
Lustre:
Sub-Vitreous, Waxy
Hardness:
2
Specific Gravity:
2.36
Crystal System:
Triclinic
Name:
Named by Roland Pierrot in 1964 for the Rauenthal Valley, France near the original locality Ste Marie-aux-Mines.
Often associated with the chemically nearly identical phaunouxite, but phaunouxite easily dehydrates to rauenthalite.


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Classification of RauenthaliteHide

Approved
Approval Year:
1964
8.CJ.40

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
40.3.11.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
3 : A3(XO4)2·xH2O
20.2.13

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

Physical Properties of RauenthaliteHide

Sub-Vitreous, Waxy
Transparency:
Transparent
Colour:
Colorless, white
Streak:
Colorless
Hardness:
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.36 g/cm3 (Measured)    2.362 g/cm3 (Calculated)

Optical Data of RauenthaliteHide

Type:
Biaxial (+)
RI values:
nα = 1.540 - 1.546 nβ = 1.552 nγ = 1.570 - 1.576
2V:
Measured: 85° , Calculated: 80°
Birefringence:
0.030
Max Birefringence:
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
weak
Optical Extinction:
Inclined
Pleochroism:
Non-pleochroic

Chemical Properties of RauenthaliteHide

Formula:
Ca3(AsO4)2 · 10H2O

Crystallography of RauenthaliteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 12.564(8) Å, b = 12.169(7) Å, c = 6.195(4) Å
α = 89.09(3)°, β = 79.69(3)°, γ = 118.58(4)°
Ratio:
a:b:c = 1.032 : 1 : 0.509
Unit Cell V:
812.65 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Bladed crystals, often in somewhat radial arrangement.
Comment:
Non-standard setting.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
10.8 (100)
6.2 (very weak)
3.79 (faint)
3.36 (medium)
2.58 (very weak)
2.44 (weak)
2.04 (very weak)

Type Occurrence of RauenthaliteHide

General Appearance of Type Material:
Colorless to cloudy white bladed crystals
Geological Setting of Type Material:
Post-mine efflorescence on mine tunnel walls.
Associated Minerals at Type Locality:

Synonyms of RauenthaliteHide

Other Language Names for RauenthaliteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Phaunouxite6 photos of Rauenthalite associated with Phaunouxite on mindat.org.
Guérinite4 photos of Rauenthalite associated with Guérinite on mindat.org.
Picropharmacolite4 photos of Rauenthalite associated with Picropharmacolite on mindat.org.
Pharmacolite2 photos of Rauenthalite associated with Pharmacolite on mindat.org.
Sainfeldite2 photos of Rauenthalite associated with Sainfeldite on mindat.org.
Calcite2 photos of Rauenthalite associated with Calcite on mindat.org.
Monohydrocalcite1 photo of Rauenthalite associated with Monohydrocalcite on mindat.org.
Dolomite1 photo of Rauenthalite associated with Dolomite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

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.25VladimiriteCa4(AsO4)2(AsO3OH) · 4H2OMon. 2/m : P21/b
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.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,La)(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Rhabdophane-(La)(La,Ce)(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Rhabdophane-(Nd)(Nd,Ce,La)(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Tristramite(Ca,U,Fe)(PO4,SO4) · 2H2OHex.
8.CJ.45SmirnovskiteCaTh(PO4)2 · nH2OHex. 6 2 2 : P62 2 2
8.CJ.50ArdealiteCa2(HPO4)(SO4) · 4H2OMon. m : Bb
8.CJ.50BrushiteCa(HPO4) · 2H2OMon. 2/m : B2/b
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 - 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
20.2.9SainfelditeCaCa2Ca2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
20.2.10VladimiriteCa4(AsO4)2(AsO3OH) · 4H2OMon. 2/m : P21/b
20.2.11GuériniteCa5(AsO4)2(HAsO4)2 · 9H2OMon. 2/m : P21/b
20.2.12FerrarisiteCa5(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
20.2.14PhaunouxiteCa3(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

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 RauenthaliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pierrot, R. (1964): Contribution à la minéralogie des arséniates calciques et calcomagnésiens naturels. ulletin de la Société française de Minéralogie et de Cristallographie 87, 169-211. [Abs. in American Mineralogist (1965): 50: 805]
Walenta, K. (1972): Die Sekundärmineralien der Co-Ni-Ag-Bi-U-Erzgänge im Gebiet von Wittichen im mittleren Schwarzwald. Aufschluß, 23, 279-329. (in German) [esp. p. 311]
Bari, H., Catti, M., Ferraris, G., Ivaldi, G. & Permingeat, F. (1982): Phaunouxite Ca3(AsO4)2•11H2O, a new mineral strictly associated with rauenthalite. Bull. Minéral. 105, 327-332.
Catti, M. and Ivaldi, G. (1983): On the Topotactic Dehydration Ca3(AsO4)2.11H2O (Phaunouxite) -> Ca3(AsO4)2.10H20 (rauenthalite) and Structure of Both Minerals. Acta Crystallographica B39: 4-10.

Internet Links for RauenthaliteHide

Localities for RauenthaliteHide

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.
Austria
 
  • Styria
    • Schladming
      • Schladminger Tauern
        • Obertalbach valley
Taucher, J. & Hollerer, C.E. (1994): Phaunouxit und Rauenthalit von der Co-Ni-Lagerstätte Zinkwand-Vöttern, Schladminger Tauern, Steiermark. Matrixx 3, 69-72.
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Karlovy Vary Region
      • Krušné Hory Mts (Erzgebirge)
        • Jáchymov District (St Joachimsthal)
Lapis 2002(7/8), 63-65
    • Plzeň Region
      • Planá u Mariánských Lázní (Plan)
Tvrdý, J., Řídkošil, T.: Sekundární minerály z lokality Svatá Anna v Plané u Mariánských Lázní. Časopis pro mineralogii a geologii, 1983, roč. 28, č. 3, s. 316.; http://www.mineralos.cz/lokality/plana/plana.htm
France
 
  • Grand Est
    • Haut-Rhin
      • Ste Marie-aux-Mines (Markirch)
P&T N°23-24, H. BARI 1982, Minéralogie des filons du Neuenberg à Sainte Marie aux Mines (Haut-Rhin).
Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
Paul De Bondt
Pierre et Terre 1982
          • Sankt Jakob vein
Pierrot: Bull. Soc. Franc. Min. Cristallog. 87 (1964)
P&T N°23-24, H. BARI 1982, Minéralogie des filons du Neuenberg à Sainte Marie aux Mines (Haut-Rhin).
in the collection of Joachim Esche
  • Occitanie
    • Aude
      • Carcassonne
        • Mas-Cabardès
          • Salsigne
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 4, 2000
G. Favreau : "La mine d'or de Salsigne : Les minéraux des scories de Villagnère", Le Règne Minéral, hors série, 3, 55-60, 1997
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Schenkenzell
        • Wittichen
          • Heubach Valley
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 4, 2000
      • Wolfach
        • Oberwolfach
          • Rankach valley
KOLITSCH, U. (1995): Phaunouxit, ein Neufund von der Grube Clara. - Erzgräber 9 (2), 77-80; BLAß, G. & GRAF, H. W. (1995): Neufunde von bekannten Fundstellen (13). - Mineralien-Welt 6 (3), 47-51; WALENTA, K. (1995): Neue Mineralfunde von der Grube Clara. 6. Folge, 2. Teil. - Lapis 20 (6), 41 und 46-49.
  • Hesse
    • Richelsdorf District
      • Bauhaus
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Nentershausen
        • Süß
          • Richelsdorf Smelter
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1992
  • Lower Saxony
    • Harz
      • St Andreasberg District
        • St Andreasberg
No reference listed
  • Saxony-Anhalt
    • Harz
      • Wernigerode
        • Hasserode
Wittern: "Mineralfundorte in Deutschland", 2001
  • Saxony
    • Erzgebirge
      • Marienberg District
        • Lauta
Hajek, W. (2010): Kristallwelten Marienberg. Weise Verlag, München.
      • Schlema-Hartenstein District
T. Witzke (1992) Mineralien-Welt 3(6), 16-18
      • Schneeberg District
        • Neustädtel
Lapis 30(7/8):41-70 (2005)
Ireland
 
  • Co. Kerry
    • Killarney
S. MORETON, P. DAVIDSON, D. I. GREEN and G. RYBACK (1999) Unusual Supergene Minerals at Muckross Mine, Killarney, Co. Kerry. Irish Journal of Earth Sciences 17:19-24
UK
 
  • England
    • Devon
      • Okehampton area (Northern Dartmoor)
        • Belstone
Braithwaite, R.S.W., et al., Journal of the Russell Society 6(2), 100-101(1996):
USA
 
  • Michigan
    • Keweenaw Co.
      • Mohawk
[Mineralogical Record - Vol 23 No. 2]
  • Nevada
    • Humboldt Co.
      • Osgood Mts
        • Potosi District
          • Adam Peak
NBMG Spec. Pub. 31 Minerals of Nevada
Mineral and/or Locality  
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