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About TunisiteHide

Landscape near Métlaoui, Tunisia

Métlaoui, Gafsa, Tunisia
Colourless to white
Specific Gravity:
Crystal System:
Named after Tunisia, the country in which it was discovered.
This page provides mineralogical data about Tunisite.

Classification of TunisiteHide

Approval year:
First published:

B : Carbonates with additional anions, without H2O
B : With alkalies, etc.

5 : Miscellaneous

11 : Carbonates
7 : Carbonates of Al

Physical Properties of TunisiteHide

Colourless to white
4½ on Mohs scale
Basal and prismatic
2.51(2) g/cm3 (Measured)    2.48 g/cm3 (Calculated)

Optical Data of TunisiteHide

Uniaxial (+)
RI values:
nω = 1.573(1) nε = 1.599(1)
Max Birefringence:
δ = 0.026
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of TunisiteHide


Crystallography of TunisiteHide

Crystal System:
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
Cell Parameters:
a = 11.22(1) Å, c = 6.582(1) Å
a:c = 1 : 0.587
Unit Cell V:
828.60 ų (Calculated from Unit Cell)

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0015681TunisiteEffenberger H, Kluger F, Pertlik F, Zemann J (1981) Tunisit: kristallstruktur und revision der chemischen formel Tschermaks Mineralogische und Petrographische Mitteilungen 28 65-7719810293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
5.615 Å(10)
2.592 Å(9)
3.551 Å(8)
3.288 Å(7)
2.s26 Å(7)

Type Occurrence of TunisiteHide

General Appearance of Type Material:
Fills cavities or a thin coating on calcite or small tabular crystals.
Place of Conservation of Type Material:
National Museum in Prague (specimen No. 53823).
National School of Mines, Paris, France.
Geological Setting of Type Material:
Latest hydrothermal stage of lead zinc deposit
Associated Minerals at Type Locality:
Johan, Z., Povondra, P., Slánsky, E. (1969) Tunisite, a new carbonate from Tunisia. American Mineralogist: 54: 1-13.

Synonyms of TunisiteHide

Other Language Names for TunisiteHide


Common AssociatesHide

Associated Minerals Based on Photo Data:
3 photos of Tunisite associated with CelestineSrSO4
2 photos of Tunisite associated with CalciteCaCO3
1 photo of Tunisite associated with BaryteBaSO4

Related Minerals - Nickel-Strunz GroupingHide

5.BB.10DawsoniteNaAlCO3(OH)2Orth. mmm (2/m 2/m 2/m) : Imma
5.BB.20SabinaiteNa4Zr2TiO4(CO3)4Mon. 2/m : B2/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

11.7.1ScarbroiteAl5(CO3)(OH)13 · 5H2OHex.
11.7.2HydroscarbroiteAl14(CO3)3(OH)36 · nH2OTric.
11.7.3DawsoniteNaAlCO3(OH)2Orth. mmm (2/m 2/m 2/m) : Imma
11.7.4HydrotalciteMg6Al2(CO3)(OH)16 · 4H2OTrig. 3m (3 2/m) : R3m
11.7.5Hydrotalcite-2HMg6Al2(CO3)(OH)16 · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
11.7.6IndigiriteMg2Al2(CO3)4(OH)2 · 15H2O
11.7.7AlumohydrocalciteCaAl2(CO3)2(OH)4 · 4H2OTric. 1 : P1
11.7.8Para-alumohydrocalciteCaAl2(CO3)2(OH)4 · 6H2O
11.7.10WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2OTrig. 3m (3 2/m) : P3c1
11.7.11MontroyaliteSr4Al8(CO3)3(OH,F)26 · 10-11H2OTric.
11.7.12DresseriteBaAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
11.7.13HydrodresseriteBaAl2(CO3)2(OH)4 · 3H2OTric.
11.7.14StrontiodresseriteSrAl2(CO3)2(OH)4 · H2OOrth.

Other InformationHide

Easily soluble in concentrated inorganic acids, except nitric acid.
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 TunisiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Johan, Z., Povondra, P., Slánsky, E. (1969) Tunisite, a new carbonate from Tunisia. American Mineralogist: 54: 1-13.
Schweizerische mineralogische und petrographische Mitteilungen (1979): 59: 223-238.
Martin, R. (1979) La tunisite des" Terres Noires" de la Drôme (France). . Schweizerische mineralogische und petrographische Mitteilungen: 59: 223–228.
Povarennykh, A.S. (1979) Slavyanskite. Mineralog. Zhurnal: I(2): 105-110.
Fleischer, M., Cabri, L.J., Chao, G.Y., Pabst, A. (1980) New Mineral Names. American Mineralogist: 65: 1065-1070 (1070).
Dolschnij, B.W. (1981) The identity of tunisite and slawjanskite. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 110(1): 96-96.
Effenberger, H., Kluger, F., Pertlik, D.D.F., Zemann, J. (1981) Tunisite - A New Layer Structure Type. Zeitschrift fur Kristallographie: 156(1-2): 31-31.
Effenberger, H., Kluger, F., Pertlik, D.D.F., Zemann, J. (1981) Tunisit: Kristallstruktur und Revision der chemischen Formel (Tunisite - Crystal Structure and Revision of Chemical Formula). Tschermaks mineralogische und petrographische Mitteilungen: 28(1): 65-77.
Fleischer, M., Burns, R.G., Cabri, L.J., Francis, C.A., Pabst, A. (1982) New mineral names. American Mineralogist: 67: 413-418 (418).
Belous, I.R., Artemenko, O.V., Koniushok, A., Panov, I., Florinskaia, V. (1983) Tunisite from mercury deposits of the northeastern Donets Basin. Doklady Akademii Nauk SSSR: 271(6): 1475-1480.
Frost, R.L., López, A., Scholz, R., de Oliveira, F.A. (2015) SEM, EDX and vibrational spectroscopic study of the mineral tunisite NaCa2Al4(CO3)4Cl(OH)8. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy: 136: 911-917.

Internet Links for TunisiteHide

Localities for TunisiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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.
  • Auvergne-Rhône-Alpes
    • Drôme
      • Nyons
P Haas collection; Martin, R. (1979). La tunisite des" Terres Noires" de la Drôme (France). Stäubli.; Hofmann, B. A., & Bernasconi, S. M. (1998). Review of occurrences and carbon isotope geochemistry of oxalate minerals: implications for the origin and fate of oxalate in diagenetic and hydrothermal fluids. Chemical Geology, 149(1), 127-146.
Saudi Arabia
  • Medina Region
Faheha, A. A., Hamidalddin, S. Q., Al-Turkestany, N. A., & Ibraheim, N. M. (2012). Concentrations Of Natural And Man-Made Radioactivity Of Surface Soil In Al-Madinh Al-Monawarah, Western Province of Saudi Arabia. Isotope and Radiation Research, 44(2), 495-504.
Tunisia (TL)
  • Kef
    • Sakiet Sidi Youssef (Saqiyat Sidi Yusuf)
Johan, Z., Povondra, P., Slánsky, E. (1969) Tunisite, a new carbonate from Tunisia. American Mineralogist: 54: 1-13.
  • Donetsk Oblast
    • Donetsk
      • Slaviansky district
Belous, I. R., Kirikilitsa, S. I., Levenshteyn, M. L., Rodina, E. K., & Florinskaya, V. N. (1984). Occurrences of mercury in northwestern Donbass salt domes. International Geology Review, 26(5), 573-582.
  • California
    • San Mateo Co.
      • Redwood City
Dunning, Gail, The Challenge Mercury Deposit, Redwood City, San Mateo County, California., BAM Journal, Vol. 9 No. 1.
Mineral and/or Locality  
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