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Rauenthalite

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Formula:
Ca
 
3
(AsO
 
4
)
 
2
· 10H
 
2
O
System:TriclinicColour:Colorless, white
Hardness:2
Name:Named by Roland Pierrot in 1964 for 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.

Classification of Rauenthalite

IMA status:Approved 1964
Strunz 8th edition ID:7/C.24-70
Nickel-Strunz 10th (pending) edition ID:8.CJ.40

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

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
3 : A3(XO4)2·xH2O
Hey's CIM Ref.:20.2.13

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

Type Locality:Gabe Gottes Mine (incl. Giftgrube), Ste Marie-aux-Mines (Markirch), Haut-Rhin, Alsace, France
General Appearance of Type Material:Colorless to cloudy white bladed crystals
Year of Discovery:1964
Geological Setting of type material:Post-mine efflorescence on mine tunnel walls.
Associated Minerals at type locality:
SainfelditeSainfelditePicropharmacolitePhaunouxitePharmacolite
Löllingite

Physical Properties of Rauenthalite

Lustre:Sub-Vitreous, Waxy
Diaphaneity (Transparency):Transparent
Colour:Colorless, white
Streak:Colorless
Hardness (Mohs):2
Tenacity:Brittle
Cleavage:None Observed
Fracture:Irregular/Uneven
Density (measured):2.36 g/cm3
Density (calculated):2.362 g/cm3

Crystallography of Rauenthalite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Space Group 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 Volume: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 Diffraction:
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)

Optical Data of Rauenthalite

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
Maximum Birefringence:δ = 0.030

Chart 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 Rauenthalite

Formula:
Ca
 
3
(AsO
 
4
)
 
2
· 10H
 
2
O
Simplified for copy/paste:Ca3(AsO4)2·10H2O
Essential elements:As, Ca, H, O
All elements listed in formula:As, Ca, H, O

Relationship of Rauenthalite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.CJ.05Stercorite
Na(NH
 
4
)HPO
 
4
· 4H
 
2
O
8.CJ.10Mundrabillaite
(NH
 
4
)
 
2
Ca(HPO
 
4
)
 
2
· H
 
2
O
8.CJ.10Swaknoite
(NH
 
4
)
 
2
Ca(HPO
 
4
)
 
2
· H
 
2
O
8.CJ.15Nabaphite
NaBaPO
 
4
· 9H
 
2
O
8.CJ.15Nastrophite
Na(Sr,Ba)PO
 
4
· 9H
 
2
O
8.CJ.20Haidingerite
CaHAsO
 
4
· H
 
2
O
8.CJ.25Vladimirite
Ca
 
4
(AsO
 
4
)
 
2
(AsO
 
3
OH) · 4H
 
2
O
8.CJ.30Ferrarisite
Ca
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 9H
 
2
O
8.CJ.35Machatschkiite
(Ca,Na)
 
6
(AsO
 
4
)(HAsO
 
4
)
 
3
(PO
 
4
,SO
 
4
) · 15H
 
2
O
8.CJ.40Phaunouxite
Ca
 
3
(AsO
 
4
)
 
2
· 11H
 
2
O
8.CJ.45Brockite
(Ca,Th,Ce)PO
 
4
· H
 
2
O
8.CJ.45Grayite
(Th,Pb,Ca)(PO
 
4
) · H
 
2
O
8.CJ.45Rhabdophane-(Ce)
(Ce,La)(PO
 
4
) · H
 
2
O
8.CJ.45Rhabdophane-(La)
(La,Ce)(PO
 
4
) · H
 
2
O
8.CJ.45Rhabdophane-(Nd)
(Nd,Ce,La)(PO
 
4
) · H
 
2
O
8.CJ.45Tristramite
(Ca,U,Fe)(PO
 
4
,SO
 
4
) · 2H
 
2
O
8.CJ.45Smirnovskite
CaTh(PO
 
4
)
 
2
· nH
 
2
O
8.CJ.50Ardealite
Ca
 
2
(HPO
 
4
)(SO
 
4
) · 4H
 
2
O
8.CJ.50Brushite
Ca(HPO
 
4
) · 2H
 
2
O
8.CJ.50Churchite-(Y)
Y(PO
 
4
) · 2H
 
2
O
8.CJ.50Pharmacolite
Ca(HAsO
 
4
) · 2H
 
2
O
8.CJ.50Churchite-(Nd)
Nd(PO
 
4
) · 2H
 
2
O
8.CJ.55Mcnearite
NaCa
 
5
(AsO
 
4
)(HAsO
 
4
)
 
4
· 4H
 
2
O
8.CJ.60Dorfmanite
Na
 
2
HPO
 
4
· 2H
 
2
O
8.CJ.65Sincosite
Ca(VO)
 
2
(PO
 
4
)
 
2
· 5H
 
2
O
8.CJ.65Bariosincosite
Ba(VO)
 
2
(PO
 
4
)
 
2
· 4H
 
2
O
8.CJ.70Catalanoite
Na
 
2
(HPO
 
4
) · 8H
 
2
O
8.CJ.75Guérinite
Ca
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 9H
 
2
O
8.CJ.85Ningyoite
CaU(PO
 
4
)
 
2
· 1-2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
20.2.1Bearsite
Be
 
2
(AsO
 
4
)(OH) · 4H
 
2
O
20.2.2Brassite
Mg(HAsO
 
4
) · 4H
 
2
O
20.2.3Rösslerite
Mg(HAsO
 
4
) · 7H
 
2
O
20.2.4Hörnesite
Mg
 
3
(AsO
 
4
)
 
2
· 8H
 
2
O
20.2.5Weilite
Ca(HAsO
 
4
)
20.2.6Johnbaumite
Ca
 
5
(AsO
 
4
)
 
3
OH
20.2.7Haidingerite
CaHAsO
 
4
· H
 
2
O
20.2.8Pharmacolite
Ca(HAsO
 
4
) · 2H
 
2
O
20.2.9Sainfeldite
CaCa
 
2
Ca
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 4H
 
2
O
20.2.10Vladimirite
Ca
 
4
(AsO
 
4
)
 
2
(AsO
 
3
OH) · 4H
 
2
O
20.2.11Guérinite
Ca
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 9H
 
2
O
20.2.12Ferrarisite
Ca
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 9H
 
2
O
20.2.14Phaunouxite
Ca
 
3
(AsO
 
4
)
 
2
· 11H
 
2
O
20.2.15Mcnearite
NaCa
 
5
(AsO
 
4
)(HAsO
 
4
)
 
4
· 4H
 
2
O
20.2.16Bergslagite
CaBeAsO
 
4
(OH)
20.2.17Adelite
CaMg(AsO
 
4
)(OH)
20.2.18Talmessite
Ca
 
2
Mg(AsO
 
4
)
 
2
· 2H
 
2
O
20.2.19Irhtemite
Ca
 
4
Mg(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 4H
 
2
O
20.2.20Camgasite
CaMg(AsO
 
4
)(OH) · 5H
 
2
O
20.2.21Picropharmacolite
Ca
 
4
Mg(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 11H
 
2
O
20.2.22Bariopharmacosiderite
Ba
 
0.5
Fe
3+
4
(AsO
 
4
)
 
3
(OH)
 
4
· 5H
 
2
O

Other Names for Rauenthalite

Synonyms:
IMA1964-007
Other Languages:
German:Rauenthalit
Russian:Рауенталит
Spanish:Rauenthalita

Other Information

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

References for Rauenthalite

Reference List:

- +
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 Rauenthalite

Search Engines:
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  • External Links:
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  • Look for Rauenthalite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Rauenthalite details from Handbook of Mineralogy (PDF)
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  • Rauenthalite specimens for sale - minfind.com
  • Specimens:The following Rauenthalite specimens are currently listed for sale on minfind.com.

    Localities for Rauenthalite

    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    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
     
    • Alsace
      • Haut-Rhin
        • Ste Marie-aux-Mines (Markirch)
    Pierrot: Bull. Soc. Franc. Min. Cristallog. 87 (1964)
          • Neuenberg
    Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
    Paul De Bondt
    Pierre et Terre 1982
    in the collection of Joachim Esche
    • Languedoc-Roussillon
      • 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
        • 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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