Sjogrenite Mineral Data
General Sjogrenite Information
Chemical Formula:
Mg6Fe+++2(CO3)(OH)16•4(H2O)
Composition:
Molecular Weight = 661.71 gm
Magnesium 22.04 % Mg 36.55 % MgO
Iron 16.88 % Fe 24.13 % Fe2 O3
Hydrogen 3.66 % H 32.67 % H2 O
Carbon 1.82 % C 6.65 % CO2
Oxygen 55.61 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Mg6 Fe3+ 2 (CO3 )(OH)16 •4(H2 O)
Environment:
In low-temperature hydrothermal veins in a metamorphosed Fe-Mn orebody (Langban, Sweden)
IMA Status:
Valid Species (Pre-IMA) 1940
Locality:
From Langban and Nordmark, Varmland, Sweden. Link to MinDat.org Location Data.
Name Origin:
Named for Stens Anders Hjalmar Sjogren (1856-1922), Swedish mineralogist, Professor of Mineralogy, University of Stockholm, Stockholm, Sweden.
Name Pronunciation:
Sjogrenite + Pronunciation
Synonym:
Sjoegrenite
Sjogrenite Image
Images:
Sjogrenite Crystallography
Axial Ratios:
a:c = 1:5.01445
Cell Dimensions:
a = 3.113, c = 15.61, Z = 0.25; V = 131.01 Den(Calc)= 2.10
Crystal System:
Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63 /mmc
X Ray Diffraction:
By Intensity(I/Io ): 7.79(1), 3.89(0.8), 1.86(0.4),
Physical Properties of Sjogrenite
Color:
White, Yellowish, Brownish.
Density:
2.11
Diaphaneity:
Transparent
Hardness:
2.5 - Finger Nail
Luster:
Vitreous - Waxy
Optical Properties of Sjogrenite
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
Optical Data:
Uniaxial (-), e=1.55, w=1.573, bire=0.0230.
Calculated Properties of Sjogrenite
Electron Density:
Bulk Density (Electron Density)=2.15 gm/cc note: Specific Gravity of Sjogrenite =2.10 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PESjogrenite = 5.43 barns/electronU=PESjogrenite x r Electron Density= 11.65 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Sjogrenite is Not Radioactive
Sjogrenite Classification
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
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 6 c2 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
References:
NAME( Athena) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
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
Search for Sjogrenite using:
[AOL ]
[Bing ]
[Dog Pile ]
[GeoScienceWorld ]
[HotBot ]
[Ixquick ]
[Lycos ]
[MAMMA ]
[Scirus ]
[Teoma ]
[WebCrawler ]
[Wikipedia ]
[YAHOO ]
Visit our Advertisers for Sjogrenite :
Ask about Sjogrenite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espa�ol
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:
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.