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Tunisite

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About TunisiteHide

06343080014947285549657.jpg
Landscape near Métlaoui, Tunisia

Métlaoui, Gafsa, Tunisia
Formula:
NaCa2Al4(CO3)4(OH)8Cl
Colour:
Colourless to white
Hardness:
Specific Gravity:
2.51
Crystal System:
Tetragonal
Name:
Named after Tunisia, the country in which it was discovered.
This page provides mineralogical data about Tunisite.


Classification of TunisiteHide

Approved
Approval year:
1967
First published:
1969
5.BB.15

5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
B : With alkalies, etc.
16a.5.2.1

16a : ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
5 : Miscellaneous
11.7.9

11 : Carbonates
7 : Carbonates of Al

Physical Properties of TunisiteHide

Transparency:
Transparent
Colour:
Colourless to white
Streak:
White
Hardness:
4½ on Mohs scale
Cleavage:
Perfect
Basal and prismatic
Density:
2.51(2) g/cm3 (Measured)    2.48 g/cm3 (Calculated)

Optical Data of TunisiteHide

Type:
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:
Moderate

Chemical Properties of TunisiteHide

Formula:
NaCa2Al4(CO3)4(OH)8Cl

Crystallography of TunisiteHide

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
P4/nmm
Setting:
P4/nmm
Cell Parameters:
a = 11.22(1) Å, c = 6.582(1) Å
Ratio:
a:c = 1 : 0.587
Unit Cell V:
828.60 ų (Calculated from Unit Cell)
Z:
2

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:
d-spacingIntensity
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:
Reference:
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

German:Tunisit
Spanish:Tunisita

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.05BarentsiteNa7Al(HCO3)2(CO3)2F4Tric.
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

Notes:
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.
France
 
  • 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.
Ukraine
 
  • 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.
USA
 
  • 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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