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Talmessite

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Formula:
Ca2Mg(AsO4)2 · 2H2O
System:
Triclinic
Colour:
White, colorless, ...
Hardness:
5
Name:
Named after its discovery locality, the Talmessi Mine, Iran.

Classification of Talmessite

Approved
8.CG.05

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1
40.2.2.5

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
20.2.18

20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba
mindat.org URL:
http://www.mindat.org/min-3876.html
Please feel free to link to this page.

Type Occurrence of Talmessite

Year of Discovery:
1960

Physical Properties of Talmessite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
White, colorless, translucent pale green (nickelian), brownish pink (cobaltian)
Hardness (Mohs):
5

Crystallography of Talmessite

Crystal System:
Triclinic
Cell Parameters:
a = 5.87Å, b = 6.94Å, c = 5.53Å
α = 97.3°, β = 108.7°, γ = 108.1°
Ratio:
a:b:c = 0.846 : 1 : 0.797

Optical Data of Talmessite

Type:
Biaxial (-)
RI values:
nα = 1.672 nβ = 1.685 nγ = 1.698
2V:
Measured: 90° , Calculated: 88°
Max Birefringence:
δ = 0.026
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v strong

Chemical Properties of Talmessite

Formula:
Ca2Mg(AsO4)2 · 2H2O
Essential elements:
All elements listed in formula:

Relationship of Talmessite to other Species

Series:
Forms a series with Gaitite (see here)
Forms a series with β-Roselite (see here)
Other Members of Group:
CassidyiteCa2(Ni2+,Mg)(PO4)2 · 2H2O
CollinsiteCa2(Mg,Fe2+)(PO4)2 · 2H2O
FairfielditeCa2(Mn2+,Fe2+)(PO4)2 · 2H2O
GaititeCa2Zn(AsO4)2 · 2H2O
MesseliteCa2(Fe2+,Mn2+)(PO4)2 · 2H2O
NickeltalmessiteCa2Ni(AsO4)2 · 2H2O
ParabrandtiteCa2Mn2+(AsO4)2 · 2H2O
Unnamed (Fe2+-analogue of Parabrandtite)Ca2Fe2+(AsO4)2 · 2H2O
β-RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2O
8.CG.05CassidyiteCa2(Ni2+,Mg)(PO4)2 · 2H2O
8.CG.05CollinsiteCa2(Mg,Fe2+)(PO4)2 · 2H2O
8.CG.05FairfielditeCa2(Mn2+,Fe2+)(PO4)2 · 2H2O
8.CG.05GaititeCa2Zn(AsO4)2 · 2H2O
8.CG.05MesseliteCa2(Fe2+,Mn2+)(PO4)2 · 2H2O
8.CG.05ParabrandtiteCa2Mn2+(AsO4)2 · 2H2O
8.CG.05HilliteCa2(Zn,Mg)(PO4)2 · 2 H2O
8.CG.10BrandtiteCa2(Mn2+,Mg)(AsO4)2 · 2H2O
8.CG.10RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2O
8.CG.10WendwilsoniteCa2Mg(AsO4)2 · 2H2O
8.CG.10ZincroseliteCa2Zn(AsO4)2 · 2H2O
8.CG.10RruffiteCa2Cu(AsO4)2 · 2H2O
8.CG.15FerrilotharmeyeriteCa(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)
8.CG.15LotharmeyeriteCa(Zn,Mn3+)2(AsO4)2 · 2(H2O,OH)
8.CG.15MawbyitePb(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)
8.CG.15MounanaitePbFe23+(VO4)2(OH,F)2
8.CG.15ThometzekitePb(Cu,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
8.CG.15TsumcoritePb(Zn,Fe3+)2(AsO4)2 · 2(H2O,OH)
8.CG.15CobaltlotharmeyeriteCa(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
8.CG.15CabalzariteCa(Mg,Al,Fe3+)2(AsO4)2(OH,H2O)2
8.CG.15Krettnichite(Pb,Sr)(Mn3+,Co)2(VO4)2 · 2(OH,H2O)
8.CG.15CobalttsumcoritePb(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
8.CG.15NickellotharmeyeriteCa(Ni,Fe3+,Co)2(AsO4)2 · 2(H2O,OH)
8.CG.15ManganlotharmeyeriteCa(Mn3+,Zn)2(AsO4)2(OH,H2O)2
8.CG.15Schneebergite(Bi3+,Ca)(Co,Ni,Fe3+)2(AsO4)2(OH,H2O)2
8.CG.15Nickelschneebergite(Bi3+,Ca)(Ni,Co,Fe3+)2(AsO4)2 · 2(OH,H2O)
8.CG.20GartrellitePb(Cu,Fe3+,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
8.CG.20HelmutwinkleritePb(Zn,Cu)2(AsO4)2 · 2H2O
8.CG.20ZincgartrellitePb(Zn,Fe3+,Cu)2(AsO4)2 · 2(H2O,OH)
8.CG.20RappolditePb(Co,Ni,Zn)2(AsO4)2 · 2H2O
8.CG.20PhosphogartrellitePb(Cu,Fe3+)2(PO4,AsO4)2 · 2(H2O,OH)
8.CG.20LukrahniteCa(Cu,Zn)(Fe3+,Zn)(AsO4)2 · 2(H2O,OH)
8.CG.25PottsiteHPbBi(VO4)2 · 2H2O
8.CG.35NickeltalmessiteCa2Ni(AsO4)2 · 2H2O
20.2.1BearsiteBe2(AsO4)(OH) · 4H2O
20.2.2BrassiteMg(HAsO4) · 4H2O
20.2.3RössleriteMg(HAsO4) · 7H2O
20.2.4HörnesiteMg3(AsO4)2 · 8H2O
20.2.5WeiliteCa(HAsO4)
20.2.6JohnbaumiteCa5(AsO4)3OH
20.2.7HaidingeriteCaHAsO4 · H2O
20.2.8PharmacoliteCa(HAsO4) · 2H2O
20.2.9SainfelditeCaCa2Ca2(AsO4)2(HAsO4)2 · 4H2O
20.2.10VladimiriteCa4(AsO4)2(AsO3OH) · 4H2O
20.2.11GuériniteCa5(AsO4)2(HAsO4)2 · 9H2O
20.2.12FerrarisiteCa5(AsO4)2(HAsO4)2 · 9H2O
20.2.13RauenthaliteCa3(AsO4)2 · 10H2O
20.2.14PhaunouxiteCa3(AsO4)2 · 11H2O
20.2.15McneariteNaCa5(AsO4)(HAsO4)4 · 4H2O
20.2.16BergslagiteCaBeAsO4(OH)
20.2.17AdeliteCaMg(AsO4)(OH)
20.2.19IrhtemiteCa4Mg(AsO4)2(HAsO4)2 · 4H2O
20.2.20CamgasiteCaMg(AsO4)(OH) · 5H2O
20.2.21PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2O
20.2.22BariopharmacosideriteBa0.5Fe43+(AsO4)3(OH)4 · 5H2O

Other Names for Talmessite

Name in Other Languages:

Other Information

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 Talmessite

Reference List:
American Mineralogist (1957): 42: 583.

Bariand, P. & Herpin, P. (1960): Un arséniate de calcium et de magnésium, isomorphe de la β rosélite. Bulletin de la Société française de Minéralogie et de Cristallographie: 83: 118-121.

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. (1968): Trudy Mineral. Muzeya Akad. Nauk SSSR: 18: 154-167.

Canadian Mineralogist (1976): 14: 198.

Catti, M., Ferraris, G., Ivaldi, G. (1977): Hydrogen bonding in the crystalline state. Structure of talmessite, Ca2(Mg,Co)(AsO4)2•2H2O, and crystal chemistry of related minerals. Bulletin de la Société française de Minéralogie et de Cristallographie, 100, 230-236.

Weiss, S., Lengauer, C.L., Parodi, G.C. (2002): Roselith, Wendwilsonit und kobalthaltiger Talmessit aus Bou Azzer, Marokko. Lapis 27 (1), 37-41; 58. (in German)

Joswig, W., Paulus, E. F., Liebscher, B. (2004): Crystal structure of dicalcium (cobalt,magnesium) diarsenate dihydrate, Ca2(Co0.532Mg0.468)[AsO4]2•2H2O, hydrogen bonding in talmessite. Z. Kristallogr. - New Cryst. Struct. 219, 341-342. [<[Note: The use of the mineral name talmessite in the paper title is erroneous; the sample in fact corresponds to roselite-beta.]

Internet Links for Talmessite

Specimens:
The following Talmessite specimens are currently listed for sale on minfind.com.

Localities for Talmessite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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
 
  • Carinthia
    • Friesach - Hüttenberg area
      • Hüttenberg
        • Lölling
          • Stelzing
            • Klippitztörl road cuts
Meixner, H. & Ruscha, S. (1979): Talmessit, ein für Österreich neues Mineral, aus der Umgebung des Klippitztörls, Saualpe, Kärnten. Karinthin 80, 86-88.; G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
Chile
 
  • Arica and Parinacota Region
    • Arica Province
      • Los Camarones
Samples analysed by Tony Kampf of LAC Mineralogical Museum, USA
  • Atacama Region
    • Copiapó Province
      • Tierra Amarilla
        • Pampa Larga district
Yang, H., Jenkins, R.A., Downs, R.T., Evans, S.H., Tait, K.T. (2011): Rruffite, Ca2Cu(AsO4)2·2H2O,a new member of the roselite group, from Tierra Amarilla, Chile. Canadian Mineralogist, 49, 877-884
    • Huasco Province
      • Freirina
        • Sierra Perdices
Samples analysed by Dr. Jochen Schluter (Hamburg University), Germany; http://www.lrz-muenchen.de/~mineralogische-sammlungen-dmg/analysen/talmessit.htm
  • Tarapacá Region
    • El Tamarugal Province
      • Salar Grande
samples analysed by Anthony Kampf, Curator Emeritus of Mineral Sciences at NHM of LAC, California
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Karlovy Vary Region
      • Krušné Hory Mts (Erzgebirge)
        • Jáchymov District (St Joachimsthal)
Lapis 2002(7/8), 63-65
France
 
  • Alsace
    • Haut-Rhin
Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
  • Provence-Alpes-Côte d'Azur
    • Alpes-Maritimes
Feraud, J., Pillard, F. & Vernet, J. (1976): Talmessite, Ca2Mg(AsO4)2.2H2O, in the baritic karst of pre-albian age of Luceram (Maritime Alps, France). Bulletin de la Société française de Minéralogie et de Cristallographie 99, 331-333 (in French).; Cuchet S. (2000), Mystérieuse irhtémite à Lucéram, Alpes-Maritimes, Le Règne Minéral, n°36, pp: 38-42
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Schenkenzell
Walenta, K. (2001): Neue Mineralfunde aus dem Schwarzwald. 8. Folge, 1. Teil. Lapis, 26 (2), 39-42.
  • Hesse
    • Richelsdorf District
      • Bauhaus
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Süss
        • Richelsdorf Smelter
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1992
  • Saxony
    • Erzgebirge
Lapis 30(7/8):78-80 (2005)
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Plaka
          • Plaka Mines
Wendel, W., Blaß, G., Mühlbauer, W. & Markl, G. (1999): Hilarion - Plaka - Sounion: Lavrion-News 1997-1999. Lapis, 24 (7-8), 64-67; Branko Rieck and Karl-Heinz Fabritz information
Hungary
 
  • Baranya Co.
    • Mecsek Mts
Szakáll & Jánosi: minerals of hungary, 1995
Szakáll & Jánosi: Minerals of Hungary, 1995
Iran (TL)
 
  • Esfahan Province (Isfahan Province; Aspadana Province)
    • Nain County (Nayin County)
      • Anarak District
[Bull.Soc.fr.Min.Crist.(1960) 83, 118-121; Clark, 1993 - "Hey's Mineral Index", p684]; Bariand, P., Bachet, B., Brassy, C., Medenbach, O., Deliens, M., Vautier, R., & Piret, P. (1993) A New Uranium Mineral from the Talmessi Mine, Iran, and Rabejac, France. Mineral. Rec.: 24: 463-467
Italy
 
  • Liguria
    • Genova Province
      • Ne
        • Graveglia Valley
          • Reppia
Balestra, C., Armellino, G., Kolitsch, U., & Bracco, R. (2006). Talmessite di Gambatesa. MICRO (UK report), 2006, 25-26.
  • Piedmont
    • Cuneo Province
      • Corsaglia Valley
        • Montaldo di Mondovì
          • Borgata Oberti
            • Frazze and Rocconi localities
Kolitsch, U., Ciriotti, M.E., Cadoni, M., Armellino, G., Piccoli, G.C., Ambrino, P., Blass, G., Odicino, G., Ciuffardi, M. (2011): Montaldo di Mondovì Minerali della miniera di manganese e ferro. Micro, 9, 4-21.
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.
Morocco
 
  • Souss-Massa-Draâ Region
    • Ouarzazate Province
      • Tazenakht
        • Bou Azer District (Bou Azzer District)
          • Aghbar
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
[var: Cobaltoan Talmessite] Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Agoudal
Analyses for Jordi Frabre
Favreau, G., Dietrich, J. E., Meisser, N., Brugger, J., Ait Haddouch, L. & Maacha, L. (2007): Bou Azzer, Morocco. Mineralogical Record 38, 345-407
[var: Nickeloan Talmessite] 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
[var: Nickeloan Talmessite] Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68. (in German)
[var: Nickeloan Talmessite] 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
          • Bou Azer
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
Favreau, G. and Dietrich, J. E. (2001). Bou Azzer, description des espèces minérales. Le Cahier des Micromonteurs, (73), 34-112. (in French)
N. Meisser, J. Brugger (2006): "Bouazzerit und Maghrebit, zwei neue Arsenatmineralien aus dem Revier Bou Azzer, Marokko", Lapis 31(7/8), 69-71
          • Ightem
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Méchoui
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Oumlil
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Tamdrost
Favreau, G., Dietrich, J. E., Meisser, N., Brugger, J., Ait Haddouch, L. & Maacha, L. (2007): Bou Azzer, Morocco. Mineralogical Record 38, 345-407
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
Namibia
 
  • Otjikoto Region (Oshikoto)
    • Tsumeb
analysed - EDS & SXRD; Franz Neuhold, Vienna
Switzerland
 
  • Grischun (Grisons; Graubünden)
    • Albula Valley
      • Oberhalbstein (Surses; Sursass)
        • Tinizong (Tinzen)
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
 
  • Arizona
    • Mohave Co.
      • Hualapai Indian Reservation
The Canadian Mineralogist; October 2007; v. 45; no. 5; p. 1177-1188
      • Peach Springs Canyon
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 253, 389; Wenrich, K.J. & H.B. Sutphin (1988), Recognition of breccia pipes in northern Arizona, AZ Bur. Geol. Min. Tech. Fieldnotes: 18:1-5, 11.
  • Utah
    • Tooele Co.
      • Deep Creek Mts
        • Gold Hill District (Clifton District)
          • Gold Hill
Kokinos, M. and Wise, W.S. (1993), Famous Mineral Localities: the Gold Hill mine, Tooele County, Utah. Mineralogical Record: 24(1): 11-22.
Kokinos, M. and Wise, W.S. (1993), Famous Mineral Localities: the Gold Hill mine, Tooele County, Utah. Mineralogical Record: 24(1): 11-22.
Mineral and/or Locality  
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