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Talmessite

Big Photo

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

Show Talmessite Photos (34)
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
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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)
Member of Group:
Fairfieldite Group:
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
8.CG.35Nickeltalmessite
Ca
 
2
Ni(AsO
 
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
(AsO
 
3
OH)
 
2
(AsO
 
4
)
 
2
·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)
Other Languages:
German:Arsenatbelowit
Talmessit
Russian:Талмессит
Spanish: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

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  • 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)
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    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.
    (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 road cuts
    		G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    Chile
     
    • Atacama Region
      • Copiapó Province
        • Tierra Amarilla
          • Pampa Larga district
            • Alacrán
    		mindato foto
      • Huasco Province
        • Freirina
          • Sierra Perdices
    		Samples analysed by Dr. Jochen Schluter (Hamburg University), Germany.
    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
    Namibia
     
    • Otjikoto (Oshikoto) Region
      • 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
              • Gold Hill Mine (Western Utah Mine)
    		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
    Google
     
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