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Sainfeldite

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About SainfelditeHide

Formula:
Ca5(AsO4)2(AsO3OH)2 · 4H2O
Colour:
Colorless, pale pink
Lustre:
Sub-Vitreous, Resinous, Waxy
Hardness:
4
Specific Gravity:
3.04
Crystal System:
Monoclinic
Name:
Named by Roland Pierrot in 1964 in honour of Paul Sainfeld [1916 France - 1998], mineralogist of Musée de Minéralogie, Ecole des Mines, Paris, France who discovered the mineral.
Isostructural with:
Compare also the higher hydrates ferrarisite and its dimorph guérinite.


Classification of SainfelditeHide

Approved
8.CB.10

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
B : With only medium-sized cations, RO4:H2O = 1:1
39.2.1.2

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
2 : (AB)5[HXO4]2[XO4]2.xH2O
20.2.9

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

Physical Properties of SainfelditeHide

Sub-Vitreous, Resinous, Waxy
Transparency:
Transparent, Translucent
Colour:
Colorless, pale pink
Streak:
White
Hardness:
Tenacity:
Brittle
Fracture:
Irregular/Uneven
Density:
3.04(2) g/cm3 (Measured)    2.99(4) g/cm3 (Calculated)
Comment:
D ranges 2.99-3.027

Optical Data of SainfelditeHide

Type:
Biaxial (-)
RI values:
nα = 1.600(2) nβ = 1.610(2) nγ = 1.616(2)
2V:
Measured: 80° (2), Calculated: 74°
Birefringence:
0.016
Max Birefringence:
δ = 0.016
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v weak
Optical Extinction:
X = b, Y^c ~ 20°
Pleochroism:
Non-pleochroic

Chemical Properties of SainfelditeHide

Formula:
Ca5(AsO4)2(AsO3OH)2 · 4H2O
Common Impurities:
Co

Crystallography of SainfelditeHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 18.781(7) Å, b = 9.820(4) Å, c = 10.191(4) Å
β = 97.0°
Ratio:
a:b:c = 1.913 : 1 : 1.038
Unit Cell V:
1865.43 ų
Z:
8
Morphology:
blades-prisms in radiating aggregates and rosettes
Comment:
C2/c setting; Bull. Min. 95:33 (1972) structure

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.392 (100)
3.206 (59)
3.418 (55)
8.688 (42)
3.084 (36)
4.692 (28)
4.475 (25)
3.523 (21)
3.295 (20)
4.660 (19)
3.912 (18)
2.827 (18)
2.424 (17)
4.910 (17)
3.380 (14)
3.468 (14)
9.320 (14)
4.233 (12)
2.529 (12)
2.779 (12)
Comments:
Also see ICDD 16-615

Type Occurrence of SainfelditeHide

Synonyms of SainfelditeHide

Other Language Names for SainfelditeHide

Relationship of Sainfeldite to other SpeciesHide

Other Members of this group:
ChongiteCa3Mg2(AsO4)2(AsO3OH)2·4H2OMon. 2/m : B2/b
GiftgrubeiteCaMn2Ca2(AsO4)2(AsO3OH)2·4H2OMon. 2/m : B2/b
Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2OMon. 2/m : B2/b
MiguelromeroiteMnMn2Mn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
NyholmiteCd3Zn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
VillyaelleniteMnMn2Ca2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b

Common AssociatesHide

Associated Minerals Based on Photo Data:
Picropharmacolite17 photos of Sainfeldite associated with Picropharmacolite on mindat.org.
Guérinite13 photos of Sainfeldite associated with Guérinite on mindat.org.
Erythrite6 photos of Sainfeldite associated with Erythrite on mindat.org.
Pharmacolite5 photos of Sainfeldite associated with Pharmacolite on mindat.org.
Weilite4 photos of Sainfeldite associated with Weilite on mindat.org.
Rauenthalite2 photos of Sainfeldite associated with Rauenthalite on mindat.org.
Phaunouxite2 photos of Sainfeldite associated with Phaunouxite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.CB.05SerrabrancaiteMnPO4 · H2OMon. 2/m : B2/b
8.CB.10Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10VillyaelleniteMnMn2Ca2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10UM1997-09-AsO:CaHMgZn(Mg,Ca,Zn)5(AsO4)2(HAsO4)2 · 4H2OMon.
8.CB.10NyholmiteCd3Zn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10MiguelromeroiteMnMn2Mn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
8.CB.15FluckiteCaMn2+(HAsO4)2 · 2H2OTric. 1 : P1
8.CB.15KrautiteMn(HAsO4) · H2OMon. 2 : P21
8.CB.20Cobaltkoritnigite(Co,Zn)(HAsO4) · H2OTric. 1 : P1
8.CB.20KoritnigiteZn(HAsO4) · H2OTric. 1 : P1
8.CB.25YvoniteCu(HAsO4) · 2H2OTric.
8.CB.30GeminiteCu(HAsO4) · H2OTric.
8.CB.35SchubneliteFe3+VO4 · H2OTric.
8.CB.40RadovaniteCu2Fe3+(AsO4)(HAs3+O3)2 · H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.CB.45KazakhstaniteFe3+5V4+3V5+12O39(OH)9 · 9H2OMon.
8.CB.50KolovratiteNixZny(VO4)0.67(x+y) · nH2O
8.CB.55IrhtemiteCa4Mg(AsO4)2(HAsO4)2 · 4H2OMon.
8.CB.60BurgessiteCo2(H2O)4[AsO3(OH)]2(H2O)Mon. 2/m

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

39.2.1.1Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2OMon. 2/m : B2/b
39.2.1.3VillyaelleniteMnMn2Ca2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
39.2.1.4UM1997-09-AsO:CaHMgZn(Mg,Ca,Zn)5(AsO4)2(HAsO4)2 · 4H2OMon.
39.2.1.4MiguelromeroiteMnMn2Mn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
39.2.1.6NyholmiteCd3Zn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/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
20.2.10VladimiriteCa4(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
20.2.13RauenthaliteCa3(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 SainfelditeHide

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 SainfelditeHide

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. Bull. Soc. fr. Minéral. Cristallogr. 87, 169-211.
American Mineralogist (1965): 50: 806.
Bulletin de Mineralogie (1972): 95: 33-41. [structure]

Internet Links for SainfelditeHide

Localities for SainfelditeHide

ⓘ - 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.
Czech Republic
 
  • Karlovy Vary Region
    • Krušné Hory Mts (Erzgebirge)
      • Jáchymov District (St Joachimsthal)
Lapis 2002(7/8), 63-65
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).
  • Occitanie
    • Aude
      • Villanière
Pelison P., Descouens D. (1987), Présence de minéraux de néoformation dans les scories de l'ancienne usine de Villagnère (Aude), Le Cahier des Micromonteurs, n°2, pp: 6-10
  • Provence-Alpes-Côte d'Azur
    • Alpes-Maritimes
      • Duranus
Perroud, P. (1989). "Les minéraux de Duranus." Le Cristallier Suisse, 8(5),pp:216-230
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Schenkenzell
        • Wittichen
Carsten Slotta collection
          • Böckelsbach valley
Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
          • Burgfelsen
No reference listed
          • Heubach Valley
No reference listed
      • Wolfach
        • Oberwolfach
          • Rankach valley
Kolitsch, U. & Götzinger, M. (2000): Einige Neufunde aus der Grube Clara im mittleren Schwarzwald: Eulytin, Namibit, Volborthit, Gearksutit, Spertiniit, Monazit-(La), Protasit, Sainfeldit, Cyanotrichit und Vauquelinit. Erzgräber 14, 33-47. (in German)
  • Hesse
    • Richelsdorf District
      • Bauhaus
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Nentershausen
        • Süß
          • Richelsdorf Smelter
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1992
  • Saxony-Anhalt
    • Harz
      • Wernigerode
        • Hasserode
Wittern: "Mineralfundorte in Deutschland", 2001
  • Saxony
    • Erzgebirge
      • Marienberg District
        • Lauta
Hajek, W. (2010): Kristallwelten Marienberg. Weise Verlag, München.
      • Schneeberg
        • Neustädtel
Lapis 30(7/8):41-70 (2005)
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).
Rieck, B. & Rieck, P. (1999): Silber, Arsen und Antimon: Vererzungen im Revier Plaka (Teil 2). Lapis, 24 (7-8), 59-60.
Morocco
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Tazenakht
        • Bou Azzer District (Bou Azer District)
          • Aghbar
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Agoudal
Font Philippe specimen
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Bou Azzer Mine (Bou Azer Mine; Bouazzar Mine)
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
          • Ightem
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Tamdrost
Sergio Varvello
Switzerland
 
  • Wallis (Valais)
    • Anniviers Valley
      • Ayer
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 359.; Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
USA
 
  • Michigan
    • Keweenaw Co.
      • Mohawk
www.excaliburmineral.com/mins-z.htm
Mineral and/or Locality  
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