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Sjogrenite Mineral Data

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General Sjogrenite Information

Help on Chemical  Formula: Chemical Formula: Mg6Fe+++2(CO3)(OH)16•4(H2O)
Help on Composition: Composition: Molecular Weight = 661.71 gm
   Magnesium  22.04 %  Mg   36.55 % MgO
   Iron       16.88 %  Fe   24.13 % Fe2O3
   Hydrogen    3.66 %  H    32.67 % H2O
   Carbon      1.82 %  C     6.65 % CO2
   Oxygen     55.61 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg6Fe3+2(CO3)(OH)16•4(H2O)
Help on Environment: Environment: In low-temperature hydrothermal veins in a metamorphosed Fe-Mn orebody (Langban, Sweden)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1940
Help on Locality: Locality: From Langban and Nordmark, Varmland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Stens Anders Hjalmar Sjogren (1856-1922), Swedish mineralogist, Professor of Mineralogy, University of Stockholm, Stockholm, Sweden.
Help on Name Pronunciation: Name Pronunciation: Sjogrenite + Pronunciation Say SJOGRENITE
Help on Synonym: Synonym: Sjoegrenite
 

Sjogrenite Image

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  Sjogrenite

Comments: Red-brown sjogrenite crust on serpentinite rock.
Location: Fort Point, San Francisco County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Sjogrenite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:5.01445
Help on Cell Dimensions: Cell Dimensions: a = 3.113, c = 15.61, Z = 0.25; V = 131.01 Den(Calc)= 2.10
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.79(1), 3.89(0.8), 1.86(0.4),
 

Physical Properties of Sjogrenite

Help on Color: Color: White, Yellowish, Brownish.
Help on Density: Density: 2.11
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous - Waxy
 

Optical Properties of Sjogrenite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2674,KPDmeas= 0.2661,KC= 0.2742
Ncalc = 1.58
Help on Optical Data: Optical Data: Uniaxial (-), e=1.55, w=1.573, bire=0.0230.
 

Calculated Properties of Sjogrenite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.15 gm/cc
note: Specific Gravity of Sjogrenite =2.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PESjogrenite = 5.43 barns/electron
U=PESjogrenite x rElectron Density= 11.65 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Sjogrenite is Not Radioactive
 

Sjogrenite Classification

Help on  Dana Class: Dana Class: 16b.06.01.03 (16b)Carbonates - Hydroxyl or Halogen
  (16b.06)Dana Type
  (16b.06.01)Sjorgrenite-Hydrotalcite Group (Sojogrenite Subgroup:Hexagonal)
 
16b.06.01.01 Manasseite Mg6Al2(CO3)(OH)16•4(H2O) P 63/mmc 6/m 2/m 2/m
 
16b.06.01.02 Barbertonite Mg6Cr2(CO3)(OH)16•4(H2O) P 63/mmc 6/m 2/m 2/m
 
16b.06.01.03 Sjogrenite Mg6Fe2(CO3)(OH)16•4(H2O) P 63/mmc 6/m 2/m 2/m
 
16b.06.01.04 Zaccagnaite! Zn4Al2(OH)12(CO3)•3(H2O) P 63/mmc 6/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 05.DA.45 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DA -With medium-sized cations
 
05.DA.45 Brugnatellite Mg6Fe(CO3)(OH)13•4(H2O) P 63/mmc 6/m 2/m 2/m
 
05.DA.45 Barbertonite Mg6Cr2(CO3)(OH)16•4(H2O) P 63/mmc 6/m 2/m 2/m
 
05.DA.45 Chlormagaluminite (Mg,Fe)4Al2(OH)12(Cl2,CO3)•2(H2O) P 6/mcm, P 6cm, P 6c2 Hex
 
05.DA.45 Zaccagnaite! Zn4Al2(OH)12(CO3)•3(H2O) P 63/mmc 6/m 2/m 2/m
 
05.DA.45 Manasseite Mg6Al2(CO3)(OH)16•4(H2O) P 63/mmc 6/m 2/m 2/m
 
05.DA.45 Sjogrenite Mg6Fe2(CO3)(OH)16•4(H2O) P 63/mmc 6/m 2/m 2/m
 

Other Sjogrenite Information

Help on References: References: NAME( Athena) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Sjogrenite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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Print or Cut-and-Paste your Sjogrenite Specimen Label here :

Sjogrenite

Mg6Fe+++2(CO3)(OH)16•4(H2O)
Dana No: 16b.06.01.03 Strunz No: 05.DA.45
Locality:

 

Notes:

 

 
   
 


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