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Caminite

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About CaminiteHide

Formula:
Mg7(SO4)5(OH)4 · H2O
Colour:
Colourless, white
Hardness:
Crystal System:
Tetragonal
Name:
The name is from the Latin caminus, for chimney, since the mineral occurs in undersea black-smoker chimneys.
Not to be confused with carminite.


Classification of CaminiteHide

Approved
7.D0.05

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
0 :
31.10.9.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
10 : Miscellaneous
25.3.7

25 : Sulphates
3 : Sulphates of Mg

Physical Properties of CaminiteHide

Colour:
Colourless, white
Hardness:
2½ on Mohs scale

Optical Data of CaminiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.534 nε = 1.532
Max Birefringence:
δ = 0.002
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low

Chemical Properties of CaminiteHide

Formula:
Mg7(SO4)5(OH)4 · H2O

Crystallography of CaminiteHide

Crystal System:
Tetragonal
Cell Parameters:
a = 5.23 Å, c = 12.98 Å
Ratio:
a:c = 1 : 2.482
Unit Cell V:
355.04 ų (Calculated from Unit Cell)

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0018250CaminiteKeefer K D, Hochella M F, de Jong B H W S (1981) The structure of the magnesium hydroxide sulfate hydrate MgSO4.1/3Mg(OH)2.1/3H2O _cod_database_code 1100075 Acta Crystallographica B37 1003-10061981synthetic0293
0019045CaminiteYamnova N A, Pushcharovskii D Y, Apollonov V N (1989) Crystalline structure of a new natural Mg-sulfate Mg3[SO4]2(OH)2 Vestnik Moskovskogo Universiteta Geologiya 44 76-781989Nepa deposit of potassium salts, Eastern Siberia, Russia0293
CIF Raw Data - click here to close

Type Occurrence of CaminiteHide

Synonyms of CaminiteHide

Other Language Names for CaminiteHide

German:Caminit
Spanish:Caminita

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

25.3.1KieseriteMgSO4 · H2OMon. 2/m
25.3.2SanderiteMgSO4 · 2H2OOrth. 2 2 2 : P21 21 21
25.3.3StarkeyiteMgSO4 · 4H2OMon. 2/m : P21/b
25.3.4PentahydriteMgSO4 · 5H2OTric.
25.3.5HexahydriteMgSO4 · 6H2OMon. 2/m : P2/m
25.3.6EpsomiteMgSO4 · 7H2OOrth. 2 2 2 : P21 21 21
25.3.8VanthoffiteNa6Mg(SO4)4Mon. 2/m : P21/b
25.3.9BlöditeNa2Mg(SO4)2 · 4H2OMon. 2/m
25.3.10KonyaiteNa2Mg(SO4)2 · 5H2OMon. 2/m : P21/b
25.3.11LöweiteNa12Mg7(SO4)13 · 15H2OTrig.
25.3.12UklonskoviteNaMg(SO4)F · 2H2OMon.
25.3.13LangbeiniteK2Mg2(SO4)3Iso. 2 3 : P21 3
25.3.14LeoniteK2Mg(SO4)2 · 4H2OMon. 2/m
25.3.15PicromeriteK2Mg(SO4)2 · 6H2OMon. 2/m
25.3.16Efremovite(NH4)2Mg2(SO4)3Iso.
25.3.17Boussingaultite(NH4)2Mg(SO4)2 · 6H2OMon. 2/m : P21/b
25.3.18PickeringiteMgAl2(SO4)4 · 22H2OMon. 2/m : P21/b

Other InformationHide

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 CaminiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist: 71: 819-825.
Acta Crystallographica: B37: 1003-1006.

Internet Links for CaminiteHide

Localities for CaminiteHide

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.
India
 
  • Tamil Nadu
    • Chengalpattu district
Deepthi, K., Natesan, U., Muthulakshmi, A. L., Ferrer, V. A., Venugopalan, V. P., & Narasimhan, S. V. (2015). Mineralogical characterization in the marine environment of Kalpakkam, Southeast coast of India. Marine Georesources & Geotechnology, 33(6), 496-503.
Pacific Ocean (TL)
 
  • East Pacific Rise
    • Juan de Fuca Ridge complex
Am Min 71 (1986), 819
Poland
 
  • Silesian Voivodeship
    • Wodzisław County
      • Radlin
Kruszewski, Ł., Fabiańska, M.J., Segit, T., Kusy, D., Motyliński, R., Ciesielczuk, J., Deput, E., (2019): Carbon-nitrogen compounds, alcohols, mercaptans, monoterpenes, acetates, aldehydes, ketones, SF6, PH3, and other fire gases in coal-mining waste heaps of Upper Silesian Coal Basin (Poland) – a re-investigation by means of in situ FTIR external database approach. Science of The Total Environment (in press)
Russia
 
  • Irkutsk Oblast
    • Lower Tunguska
      • Nepa River basin
Fersman Museum, Moscow, website.
 
Mineral and/or Locality  
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