Mineralogy Database

Caminite Mineral Data

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General Caminite Information

Help on Chemical  Formula: Chemical Formula: Mg7(SO4)5(OH)4•(H2O)
Help on Composition: Composition: Molecular Weight = 736.50 gm
   Magnesium  23.10 %  Mg   38.31 % MgO
   Hydrogen    0.82 %  H     7.34 % H2O
   Sulfur     21.77 %  S    54.35 % SO3
   Oxygen     54.31 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg7(SO4)5(OH)4•(H2O)
Help on Environment: Environment: Formed by the reaction of sea water with hydrothermal fluids in a midocean ridge submarine chimney vent. Unstable below 130 deg C., below which it hydrates and redissolves in sea wa ter.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Along the East Pacific Rise at 21deg N Lat. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Latin caminus, for chimney, as the mineral occurs in undersea black-smoker chimneys.
Help on Synonym: Synonym: ICSD 66174
  PDF 39-359
 

Caminite Image

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  Caminite

Comments: White crystalline massive caminite.
Location: Nepian Deposit, East Siberian Salt Basin, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Caminite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.47909
Help on Cell Dimensions: Cell Dimensions: a = 5.239, c = 12.988, Z = 1; V = 356.48 Den(Calc)= 3.43
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 41/amd
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.345(1), 3.22(0.8), 1.871(0.5),
 

Physical Properties of Caminite

Help on Color: Color: Colorless, White.
Help on Density: Density: 2.58 - 2.79, Average = 2.68
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Caminite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.004 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.214 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1554,KPDmeas= 0.1985,KC= 0.1978
Ncalc = 1.51 - 1.68
Help on Optical Data: Optical Data: Uniaxial (-), e=1.532, w=1.534, bire=0.0020.
 

Calculated Properties of Caminite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.70 gm/cc
note: Specific Gravity of Caminite =2.69 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PECaminite = 1.85 barns/electron
U=PECaminite x rElectron Density= 4.98 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Caminite is Not Radioactive
 

Caminite Classification

Help on  Dana Class: Dana Class: 31.10.09.01 (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.10)miscellaneous
  (31.10.09)Dana Group
 
31.10.09.01 Caminite Mg7(SO4)5(OH)4•(H2O) I 41/amd 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 07.BB.05 07 - SULFATES (SELENATES, TELLURATES)
  07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O
  07.BB -With medium-sized cations
 
07.BB.05 Caminite Mg7(SO4)5(OH)4•(H2O) I 41/amd 4/m 2/m 2/m
 

Other Caminite Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Am.Min.,Vol.71,p819-825,1986) OPTIC PROP.(Am.Min.,Vol.71,p819-825,1986)
Help on See Also: See Also: Links to other databases for Caminite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Caminite

Mg7(SO4)5(OH)4•(H2O)
Dana No: 31.10.09.01 Strunz No: 07.BB.05
Locality:

 

Notes:

 

 
   
 


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