Siderite Mineral Data + Say SIDERITE

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 Synonym: Synonym: Chalybite
  ICSD 100678
  Iron spar
  PDF 29-696
  Spathose iron
 

Siderite Image

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Siderite   Arsenopyrite

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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Siderite   Garronite

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 ScalenohedralH-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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Forms: [ 1 1 0] [ 1 1 1] [ 0 0 1]

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Graf D L , American Mineralogist , 46 (1961) p.1283-1316, Crystallographic tables for the rhombohedral carbonates

 

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 Diaphaniety: Diaphaniety: 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: None.
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
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:

relectron=3.74 gm/cc
note: rSiderite =3.87 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.01155
Boson Index = 0.98845
Help on Photoelectric: Photoelectric:

PESiderite = 14.62 barns/electron
U=PESiderite x relectron= 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: 14.1.1.3 (14)Anhydrous Carbonates
  (14.1)with Simple Formula A+ CO3
  (14.1.1)Calcite Group (Trigonal: R3¯c)
 
14.1.1.1 Calcite CaCO3 R 3c 3 2/m
 
14.1.1.2 Magnesite MgCO3 R 3c 3 2/m
 
14.1.1.3 Siderite FeCO3 R 3c 3 2/m
 
14.1.1.4 Rhodochrosite MnCO3 R 3c 3 2/m
 
14.1.1.5 Sphaerocobaltite CoCO3 R 3c 3 2/m
 
14.1.1.6 Smithsonite ZnCO3 R 3c 3 2/m
 
14.1.1.7 Otavite CdCO3 R 3c 3 2/m
 
14.1.1.8 Gaspeite (Ni,Mg,Fe)CO3 R 3c 3 2/m
Help on Strunz Class: Strunz Class: V/B.02-40 V - Nitrates, Carbonates and Borates
  V/B - Waterfree carbonates [CO3]2- without unfamiliar anions
  V/B.02 - Calcite group
 
V/B.02-10 Vaterite CaCO3 P 63/mmc 6/m 2/m 2/m
 
V/B.02-20 Calcite CaCO3 R 3c 3 2/m
 
V/B.02-30 Magnesite MgCO3 R 3c 3 2/m
 
V/B.02-40 Siderite FeCO3 R 3c 3 2/m
 
V/B.02-50 Rhodochrosite MnCO3 R 3c 3 2/m
 
V/B.02-60 Smithsonite ZnCO3 R 3c 3 2/m
 
V/B.02-70 Sphaerocobaltite CoCO3 R 3c 3 2/m
 
V/B.02-80 Gaspeite (Ni,Mg,Fe)CO3 R 3c 3 2/m
 
V/B.02-90 Otavite CdCO3 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 - Applied Mineralogy 6 -Athena 7 - Crocoite.com Mineral Locations 8 - EUROmin Project 9 - Franklin Minerals(Dunn) 10 - Franklin Minerals(Palache) 11 - Glendale Community College 12 -Google Images 13 -Google Scholar 14 -Handbook of Mineralogy (UofA) 15 - HyperPhysics 16 -MinDAT 17 -MinMax(Deutsch) 18 -MinMax(English) 19 - Mineral and Gemstone Kingdom 20 -Mineralienatlas (Deutsch) 21 - Minerals of Wisconsin 22 -NSDL Reciprocal Net (JAVA) 23 -QUT Mineral Atlas 24 - Scandinavian mineral gallery 25 -University of Colorado - Mineral Structure Data 26 -University of Minnesota 27 - WWW-MINCRYST 28 - YupRocks 29 -theimage 30 -École des Mines de Paris

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

Siderite

Fe++CO3
Dana No: 14.1.1.3 Strunz No: V/B.02-40
Locality:

 

Notes:

 
 
   
 
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