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Phaunouxite

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Formula:
Ca
 
3
(AsO
 
4
)
 
2
· 11H
 
2
O
System:TriclinicColour:Colourless
Name:
Named after Phaunoux, the French name for the Rauenthal valley (France), where the mineral was first found.


Often associated with the chemically nearly identical Rauenthalite.

Classification of Phaunouxite

IMA status:Approved 1980
Strunz 8th edition ID:7/C.24-80
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:40.3.12.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
3 : A3(XO4)2·xH2O
Hey's CIM Ref.:20.2.14

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 Phaunouxite

Type Locality:Gabe Gottes Mine (incl. Giftgrube), Ste Marie-aux-Mines (Markirch), Haut-Rhin, Alsace, France
Year of Discovery:1980

Physical Properties of Phaunouxite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Colourless

Crystallography of Phaunouxite

Crystal System:Triclinic
Cell Parameters:a = 12.563(7) Å, b = 12.181(6) Å, c = 6.205(4) Å
α = 88.94(3)°, β = 91.67(3)°, γ = 113.44(3)°
Ratio:a:b:c = 1.031 : 1 : 0.509
Unit Cell Volume:V 870.80 ų (Calculated from Unit Cell)
Comment:Non-standard setting.
X-Ray Powder Diffraction:
d-spacingIntensity
11.49 (10)
6.23 (9)
5.42 (8)
3.276 (9)
2.963 (6)
2.810 (6)
2.443(7)

Optical Data of Phaunouxite

Type:Biaxial (+)
RI values: nα = 1.532 nβ = 1.542 nγ = 1.556
2V:Measured: 80° , Calculated: 82°
Maximum Birefringence:δ = 0.024

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:weak

Chemical Properties of Phaunouxite

Formula:
Ca
 
3
(AsO
 
4
)
 
2
· 11H
 
2
O
Simplified for copy/paste:Ca3(AsO4)2·11H2O
Essential elements:As, Ca, H, O
All elements listed in formula:As, Ca, H, O

Relationship of Phaunouxite 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.40Rauenthalite
Ca
 
3
(AsO
 
4
)
 
2
· 10H
 
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
20.2.13Rauenthalite
Ca
 
3
(AsO
 
4
)
 
2
· 10H
 
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 Phaunouxite

Synonyms:
IMA1980-062
Other Languages:
German:Phaunouxit
Russian:Фонуксит

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 Phaunouxite

Reference List:

- +
Bari, H., Catti, M., Ferraris, G., Ivaldi, G. & Permingeat, F. (1982): Phaunouxite Ca3(AsO4)*11H2O, a new mineral strictly associated with rauenthalite. Bull. Minéral. 105, 327-332. [Abs. in American Mineralogist (1983): 68: 850.]

Catti, M. & Ivaldi, G. (1983): On the topotactic dehydration Ca3(AsO4)2•11H2O (phaunouxite) —› Ca3(AsO4)2•10H2O (rauenthalite), and the structures of both minerals. Acta Crystallographica B39, 4-10.

Internet Links for Phaunouxite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Phaunouxite details from Handbook of Mineralogy (PDF)
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  • Localities for Phaunouxite

    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)
      • Plzeň Region
        • Planá u Mariánských Lázní (Plan)
    http://www.mineralos.cz/lokality/plana/plana.htm
    France
     
    • Alsace
      • Haut-Rhin
        • Ste Marie-aux-Mines (Markirch)
    [MinRec 19:256]
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Schenkenzell
          • Wittichen
    Carsten Slotta collection (XRD-analysed by Uwe Kolitsch)
        • 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): Namibit, ein Neufund aus dem Schwarzwald. - Mineralien-Welt 6 (6), 20-22; U. Kolitsch, J. Gröbner, G. Blaß and H.-W. Graf (2007): Neufunde aus der Grube Clara im mittleren Schwarzwald (III): Cerianit-(Ce), Dravit, Florencit-(La), Gilmarit, Olenit und Scotlandit. Lapis 32, 19-23, 70.
    • 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
      • Erzgebirge
        • Schlema-Hartenstein District
    T. Witzke (1992) Mineralien-Welt 3(6), 16-18
    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
    Japan
     
    • Kyushu Region
      • Oita prefecture
        • Saiki City
          • Kiura mine (Shin-Kiura mine; Kiura emery mine)
    Masayuki Ohnishi, Norimasa Shimobayashi, Shigetomo Kishi, Mitsuo Tanabe, Shoichi Kobayashi (2013) Talmessite from the Uriya deposit at the Kiura mining area, Oita Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 108, No. 2 (April), 116-120.
    UK
     
    • England
      • Cumbria
        • North and Western Region (Cumberland)
          • Caldbeck Fells
    No reference listed
    Mineral and/or Locality  
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