Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (10 online) Mindat Auctions

Talmessite

Big Photo

Aït Ahmane, Bou Azzer District, Tazenakht, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco
© R.D.Green

Show Talmessite Photos (16)
Formula:
Ca
 
2
Mg[AsO
 
4
]
 
2
 · 2H
 
2
O
System:TriclinicColour:White, colorless, ...
Hardness:5
Name:Named after its discovery locality, the Talmessi Mine, Iran.


Fairfieldite Group. Gaitite-Talmessite Series, and the Talmessite - β-Roselite Series.

Classification of Talmessite

IMA status:Approved
Strunz 8th edition ID:7/C.17-50
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:40.2.2.5

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
Hey's CIM Ref.: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

Type Locality:Talmessi Mine (Talmesi Mine; Telmessi Mine; Telmesi Mine), Anarak District, Esfahan Province (Isfahan Province; Aspadana Province), Iran
Year of Discovery:1960

Physical Properties of Talmessite

Lustre: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
Unit Cell Volume:V 196.29 ų (Calculated from Unit Cell)

Optical Data of Talmessite

Type:Biaxial (-)
RI values: nα = 1.672 nβ = 1.685 nγ = 1.698
2V:Measured: 90° , Calculated: 88°
Maximum Birefringence:δ = 0.026

Chart 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:
Ca
 
2
Mg[AsO
 
4
]
 
2
 · 2H
 
2
O
Essential elements:As, Ca, H, Mg, O
All elements listed in formula:As, Ca, H, Mg, O

Relationship of Talmessite to other Species

Series:Forms a series with Gaitite (see here)
Forms a series with β-Roselite (see here)
Related Minerals - Nickel-Strunz Grouping):
8.CG.05Cassidyite
Ca
 
2
(Ni
2+
 
,Mg)[PO
 
4
]
 
2
 · 2H
 
2
O
8.CG.05Collinsite
Ca
 
2
(Mg,Fe
2+
 
)[PO
 
4
]
 
2
 · 2H
 
2
O
8.CG.05Fairfieldite
Ca
 
2
(Mn
2+
 
,Fe
2+
 
)[PO
 
4
]
 
2
 · 2H
 
2
O
8.CG.05Gaitite
Ca
 
2
Zn[AsO
 
4
]
 
2
 · 2H
 
2
O
8.CG.05Messelite
Ca
 
2
(Fe
2+
 
,Mn
2+
 
)[PO
 
4
]
 
2
 · 2H
 
2
O
8.CG.05Parabrandtite
Ca
 
2
Mn
2+
 
[AsO
 
4
]
 
2
 · 2H
 
2
O
8.CG.05β-Uranophane
Ca(UO
 
2
)
 
2
[HSiO
 
4
]
 
2
 · 5H
 
2
O
8.CG.05Hillite
Ca
 
2
(Zn,Mg)[PO
 
4
]
 
2
 · 2 H
 
2
O
8.CG.10Brandtite
Ca
 
2
(Mn
2+
 
,Mg)[AsO
 
4
]
 
2
 · 2H
 
2
O
8.CG.10Roselite
Ca
 
2
(Co
2+
 
,Mg)[AsO
 
4
]
 
2
 · 2H
 
2
O
8.CG.10Wendwilsonite
Ca
 
2
(Mg,Co
2+
 
)[AsO
 
4
]
 
2
 · 2H
 
2
O
8.CG.10Zincroselite
Ca
 
2
Zn[AsO
 
4
]
 
2
 · 2H
 
2
O
8.CG.15Ferrilotharmeyerite
Ca(Fe
3+
 
,Zn)
 
2
[AsO
 
4
]
 
2
 · 2(OH,H
 
2
O)
8.CG.15Lotharmeyerite
Ca(Zn,Mn
3+
 
)
 
2
[AsO
 
4
]
 
2
 · 2(H
 
2
O,OH)
8.CG.15Mawbyite
Pb(Fe
3+
 
,Zn)
 
2
[AsO
 
4
]
 
2
 · 2(OH,H
 
2
O)
8.CG.15Mounanaite
PbFe
3+
2
[VO
 
4
]
 
2
 · 2(OH,F)
8.CG.15Thometzekite
Pb(Cu,Zn)
 
2
[AsO
 
4
,SO
 
4
]
 
2
 · 2(H
 
2
O,OH)
8.CG.15Tsumcorite
Pb(Zn,Fe
3+
 
)
 
2
[AsO
 
4
]
 
2
 · 2(H
 
2
O,OH)
8.CG.15Cobaltlotharmeyerite
Ca(Co,Fe
3+
 
,Ni)
 
2
[AsO
 
4
]
 
2
 · 2(H
 
2
O,OH)
8.CG.15Cabalzarite
Ca(Mg,Al,Fe
3+
 
)
 
2
[AsO
 
4
]
 
2
 · 2(OH,H
 
2
O)
8.CG.15Krettnichite
(Pb,Sr)(Mn
3+
 
,Co)
 
2
[VO
 
4
]
 
2
 · 2(OH,H
 
2
O)
8.CG.15Cobalttsumcorite
Pb(Co,Fe
3+
 
,Ni)
 
2
[AsO
 
4
]
 
2
 · 2(H
 
2
O,OH)
8.CG.15Nickellotharmeyerite
Ca(Ni,Fe
3+
 
,Co)
 
2
[AsO
 
4
]
 
2
 · 2(H
 
2
O,OH)
8.CG.15Manganlotharmeyerite
Ca(Mn
3+
 
,Zn)
 
2
[AsO
 
4
]
 
2
 · 2(OH,H
 
2
O)
8.CG.15Schneebergite
(Bi
3+
 
,Ca)(Co,Ni,Fe
3+
 
)
 
2
[AsO
 
4
]
 
2
 · 2(OH,H
 
2
O)
8.CG.15Nickelschneebergite
(Bi
3+
 
,Ca)(Ni,Co,Fe
3+
 
)
 
2
[AsO
 
4
]
 
2
 · 2(OH,H
 
2
O)
8.CG.20Gartrellite
Pb(Cu,Fe
3+
 
,Zn)
 
2
[AsO
 
4
,SO
 
4
]
 
2
 · 2(H
 
2
O,OH)
8.CG.20Helmutwinklerite
Pb(Zn,Cu)
 
2
[AsO
 
4
]
 
2
 · 2H
 
2
O
8.CG.20Zincgartrellite
Pb(Zn,Fe
3+
 
,Cu)
 
2
[AsO
 
4
]
 
2
 · 2(H
 
2
O,OH)
8.CG.20Rappoldite
Pb(Co,Ni,Zn)
 
2
[AsO
 
4
]
 
2
 · 2H
 
2
O
8.CG.20Phosphogartrellite
Pb(Cu,Fe
3+
 
)
 
2
[PO
 
4
,AsO
 
4
]
 
2
 · 2(H
 
2
O,OH)
8.CG.20Lukrahnite
Ca(Cu,Zn)(Fe
3+
 
,Zn)[AsO
 
4
]
 
2
 · 2(H
 
2
O,OH)
8.CG.25Pottsite
HPbBi(VO
 
4
)
 
2
·2H
 
2
O
Related Minerals - Hey's Index Grouping:
20.2.1Bearsite
Be
 
2
[OH|AsO
 
4
] · 4H
 
2
O
20.2.2Brassite
MgHAsO
 
4
·4H
 
2
O
20.2.3Rösslerite
MgHAsO
 
4
·7H
 
2
O
20.2.4Hörnesite
Mg
 
3
(AsO
 
4
)
 
2
·8H
 
2
O
20.2.5Weilite
CaHAsO
 
4
20.2.6Johnbaumite
Ca
 
5
[OH|(AsO
 
4
)
 
3
]
20.2.7Haidingerite
Ca[HAsO
 
4
] · H
 
2
O
20.2.8Pharmacolite
CaHAsO
 
4
·2H
 
2
O
20.2.9Sainfeldite
Ca
 
5
H
 
2
(AsO
 
4
)
 
4
·4H
 
2
O
20.2.10Vladimirite
Ca
 
5
[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 5H
 
2
O
20.2.11Guérinite
Ca
 
5
[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 9H
 
2
O
20.2.12Ferrarisite
Ca
 
5
[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 9H
 
2
O
20.2.13Rauenthalite
Ca
 
3
[AsO
 
4
]
 
2
 · 10H
 
2
O
20.2.14Phaunouxite
Ca
 
3
[AsO
 
4
]
 
2
 · 11H
 
2
O
20.2.15Mcnearite
NaCa
 
5
[(HAsO
 
4
)
 
4
|AsO
 
4
] · 4H
 
2
O
20.2.16Bergslagite
CaBe[OH|AsO
 
4
]
20.2.17Adelite
CaMg[AsO
 
4
](OH)
20.2.19Irhtemite
Ca
 
4
Mg[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 4H
 
2
O
20.2.20Camgasite
CaMg[OH|AsO
 
4
] · 5H
 
2
O
20.2.21Picropharmacolite
Ca
 
4
Mg[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 11H
 
2
O
20.2.22Bariopharmacosiderite
BaFe
3+
4
[(OH)
 
5
|(AsO
 
4
)
 
3
] · 5H
 
2
O

Other Names for Talmessite

Synonyms:
Arsenate-beloviteBelovite (of Nefedov)
German names:
ArsenatbelowitTalmessit
Russian names:
Талмессит
Spanish names:
Talmessita
Varieties:
Cobaltoan TalmessiteNickeloan Talmessite

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 Talmessite

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

Bariand, P. & Herpin, P. (1960): Bulletin de la Société française de Minéralogie et de Cristallographie: 83: 118-121.

Pierrot, R. (1964): Bulletin de la Société française de Minéralogie et de Cristallographie: 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): Zeitschrift für Kristallographie: 219: 341-342.

Internet Links for Talmessite

Search Engines:
  • Look for Talmessite on Google
  • Look for Talmessite images on Google
    • External Links:
  • Look for Talmessite on Webmineral
  • Look for Talmessite on Athena Mineralogy
  • Look for Talmessite on Wikipedia
  • Look for Talmessite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Talmessite in the Natural History Museum (London) online catalogue
  • Talmessite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Fabre Minerals - search for Talmessite specimens
  • e-Rocks - Mineral Auctions and Sales
  • Wright's Rock Shop - excellent mineral specimens since 1970
  • Lapis Mineral Magazin
  • The Arkenstone - Fine Minerals
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Buy fine minerals and gemstones from Pala International
  • Buy from David K Joyce minerals
  • High-end worldwide specimens & outstanding customer service
  • Top quality minerals from Kristalle of California
  • Search for Talmessite on minvision.com
  • Search for Talmessite at Thames Valley Minerals
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to find out how you can sponsor this page.

    Localities for Talmessite

    Hide Locality List
    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.
    These maps work faster with Firefox!
    (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
     
    • Carinthia
      • Friesach - Hüttenberg area
        • Hüttenberg
          • Lölling
            • Stelzing
              • Klippitztörl Mt.
    		G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    Chile
     
    • Atacama Region
      • Copiapó Province
        • Tierra Amarilla
          • Pampa Larga district
            • Alacrán
    		mindato foto
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Karlovy Vary Region
        • Krušné Hory Mts (Erzgebirge)
          • Ostrov
    		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
    		Cuchet S. (2000), Mystérieuse irhtémite à Lucéram, Alpes-Maritimes, Le Règne Minéral, n°36, pp: 38-42
    Germany
     
    • Hesse
      • North 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 (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
        • Lavrion District Mines
          • Plaka
            • Plaka Mines
    		No reference listed
    Hungary
     
    • Baranya Co.
      • Mecsek Mts.
    		Szakáll & Jánosi: minerals of hungary, 1995
    Szakáll & Jánosi: Minerals of Hungary, 1995
    Iran
     
    • Esfahan Province (Isfahan Province; Aspadana Province)
      • Anarak District
    		[Bull.Soc.fr.Min.Crist.(1960) 83, 118-121; Clark, 1993 - "Hey's Mineral Index", p684]
    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.
    Morocco
     
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
        • Tazenakht
          • 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
            • Aït Ahmane
    		[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 Azzer
    		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
    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. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
    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.
        • 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
    		Mineralogical Record Vol. 24 Number 1
    Min Rec 24:1 pp11-22
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register.