Mineralogy Database

Siderite Mineral Data

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General Siderite Information

Help on Chemical  Formula: Chemical Formula: Fe++CO3
Help on Composition: Composition: Molecular Weight = 115.86 gm
   Iron    48.20 %  Fe   62.01 % FeO
   Carbon  10.37 %  C    37.99 % CO2
   Oxygen  41.43 %  O
          ______        ______ 
          100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+(CO3)
Help on Environment: Environment: Primarily bedded, biosedimentary deposits, also in metamorphic and igneous rocks. Forms a series with rhocochrosite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1845
Help on Locality: Locality: Common world wide. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek sideros, "iron."
Help on Name Pronunciation: Name Pronunciation: Siderite Say SIDERITE
Help on Synonym: Synonym: Chalybite
  ICSD 100678
  Iron spar
  PDF 29-696
  Spathose iron
 

Siderite Image

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  Arsenopyrite   Siderite

Comments: White, metallic arsenopyrite and tan siderite crystals.
Location: Panasqueira (2000, 3rd level), in the region of Beira Baixa, Portugal. Scale: 11 x 7 cm.
© Fabre Minerals

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  Siderite

Comments: Blocky siderite crystals on quartz.
Location: Panasqueira (2nd level), in the region of Beira Baixa, Portugal. Scale: 7 x 8 cm.
© Fabre Minerals

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  Siderite

Comments: Bladed siderite crystal groups on crystallized quartz matrix.
Location: Peyrebrune, Tarn, France. Scale: 8.7 x 6.5 x 4.7 cm.
© Fabre Minerals

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  Garronite   Siderite

Comments: Translucent white micro crystals of garronite on brown siderite crystals.
Location: Mont Saint Hilaire, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Siderite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:3.27542
Help on Cell Dimensions: Cell Dimensions: a = 4.72, c = 15.46, Z = 6; V = 298.28 Den(Calc)= 3.87
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.79(1), 1.734(0.8), 3.59(0.6),
Help on Forms: Forms:

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Help on Above

Forms: ( 1 1 0) ( 1 1 1) ( 0 0 1)

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Physical Properties of Siderite

Help on Cleavage: Cleavage: {1011} Perfect, {1011} Perfect, {1011} Perfect
Help on Color: Color: Yellowish brown, Brown, Gray, Yellowish gray, Greenish gray.
Help on Density: Density: 3.96
Help on Diaphaneity: Diaphaneity: Translucent to subtranslucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Siderite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.081 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.06 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1849,KPDmeas= 0.1807,KC= 0.1967
Ncalc = 1.76 - 1.78
Help on Optical Data: Optical Data: Uniaxial (-), e=1.57-1.633, w=1.785-1.875, bire=0.2150-0.2420.
 

Calculated Properties of Siderite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.74 gm/cc
note: Specific Gravity of Siderite =3.87 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PESiderite = 14.62 barns/electron
U=PESiderite x rElectron Density= 54.68 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Siderite is Not Radioactive
 

Siderite Classification

Help on  Dana Class: Dana Class: 14.01.01.03 (14)Anhydrous Carbonates
  (14.01)with Simple Formula A+ CO3
  (14.01.01)Calcite Group (Trigonal: R-3c)
 
14.01.01.01 Calcite CaCO3 R 3c 3 2/m
 
14.01.01.02 Magnesite MgCO3 R 3c 3 2/m
 
14.01.01.03 Siderite FeCO3 R 3c 3 2/m
 
14.01.01.04 Rhodochrosite MnCO3 R 3c 3 2/m
 
14.01.01.05 Sphaerocobaltite CoCO3 R 3c 3 2/m
 
14.01.01.06 Smithsonite ZnCO3 R 3c 3 2/m
 
14.01.01.07 Otavite CdCO3 R 3c 3 2/m
 
14.01.01.08 Gaspeite (Ni,Mg,Fe)CO3 R 3c 3 2/m
Help on  Strunz Class: Strunz Class: 05.AB.05 05 - CARBONATES (NITRATES)
  05.A - Carbonates without additional anions, without H2O
  05.AB -Alkali-earth (and other M2+) carbonates
 
05.AB.05 Calcite CaCO3 R 3c 3 2/m
 
05.AB.05 Gaspeite (Ni,Mg,Fe)CO3 R 3c 3 2/m
 
05.AB.05 Magnesite MgCO3 R 3c 3 2/m
 
05.AB.05 Rhodochrosite MnCO3 R 3c 3 2/m
 
05.AB.05 Otavite CdCO3 R 3c 3 2/m
 
05.AB.05 Sphaerocobaltite CoCO3 R 3c 3 2/m
 
05.AB.05 Siderite FeCO3 R 3c 3 2/m
 
05.AB.05 Smithsonite ZnCO3 R 3c 3 2/m
 

Other Siderite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Mason68)
Help on See Also: See Also: Links to other databases for Siderite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - Franklin Minerals(Dunn)
9 - Franklin Minerals(Palache)
10 - GeoScienceWorld
11 - Glendale Community College
12 - Google Images
13 - Google Scholar
14 - Handbook of Mineralogy (MinSocAm)
15 - Handbook of Mineralogy (UofA)
16 - HyperPhysics
17 - MinDAT
18 - Mineral and Gemstone Kingdom
19 - Mineralienatlas (Deutsch)
20 - NSDL Reciprocal Net (JAVA)
21 - Online Mineral Museum
22 - QUT Mineral Atlas
23 - Ruff.Info
24 - Scandinavian mineral gallery
25 - University of Colorado - Mineral Structure Data
26 - WWW-MINCRYST
27 - YupRocks
28 - theimage

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

Siderite

Fe++CO3
Dana No: 14.01.01.03 Strunz No: 05.AB.05
Locality:

 

Notes:

 

 
   
 


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