General Hematite Information
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Chemical Formula: |
Fe2O3 |
Composition: |
Molecular Weight = 159.69 gm |
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Iron 69.94 % Fe 100.00 % Fe2O3 |
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Oxygen 30.06 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
Fe3+2O3 |
Environment: |
Magmatic, hydrothermal, metamorphic and sedimentary. |
IMA Status: |
Valid Species (Pre-IMA) Prehistoric |
Locality: |
Matto Grosso, Brazil. Mesabi iron ore range, Minnesota, USA. Link to MinDat.org Location Data. |
Name Origin: |
From the Greek, haimatites, "bloodlike'" in allusion to vivid red color of the powder. |
Synonym: |
ICSD 64599 |
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Kidney Ore |
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Martite |
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PDF 33-664 |
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Specularite |
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Hematite Image |
Images:
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Hematite
Comments: Black, platy hematite and minor white magnesite.
Location: Brumado, Bahia, Brazil.
Scale: 9 x 4.5 cm.
© Fabre Minerals |
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Images:
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Hematite Defernite
Comments: Specular hematite rich with crystalline grains of reddish brown defernite.
Location: Kombat Mine, Kombat, Grootfontein District, Otjozondjupa Region, Namibia.
Scale: 3.9 x 2.5 cm.
© John Veevaert |
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Images:
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Hematite Rutile
Comments: Acicular, golden yellow crystals of rutile epitaxially overgrown on black crystals of hematite. The overgrowths are perpendicular to the trigonal crystallography of the hematite.
Location: Novo Horizonte, Bahia Brazil.
Scale: 4 x 3.5 x 3 cm.
© Fabre Minerals |
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Hematite Crystallography
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Axial Ratios: |
a:c = 1:2.73009 |
Cell Dimensions: |
a = 5.0317, c = 13.737, Z = 6; V = 301.20 Den(Calc)= 5.28 |
Crystal System: |
Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3c |
X Ray Diffraction: |
By Intensity(I/Io): 2.69(1), 1.69(0.6), 2.51(0.5), |
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Crystal Structure:
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Blake R L , Hessevick R E , Zoltai T , Finger L W , American Mineralogist , 51 (1966) p.123-129, Refinement of the hematite structure
View Additional jPOWD Structure files for Hematite
[1]
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Physical Properties of Hematite
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Cleavage: |
None |
Color: |
Reddish gray, Black, Blackish red. |
Density: |
5.3 |
Diaphaniety: |
Subtranslucent to opaque |
Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). |
Habit: |
Blocky - Crystal shape tends to be equant (e.g. feldspars). |
Habit: |
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite). |
Habit: |
Tabular - Form dimensions are thin in one direction. |
Hardness: |
6.5 - Pyrite |
Luminescence: |
None. |
Luster: |
Metallic |
Magnetism: |
Magnetic after heating |
Streak: |
reddish brown |
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Optical Properties of Hematite
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Dichroism (e): |
yellowish red. |
Dichroism (w): |
brownish red. |
Gladstone-Dale: |
CI meas= -0.225 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.23 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3873,KPDmeas= 0.3858,KC= 0.315 |
Optical Data: |
Uniaxial (-), e=2.87-2.94, w=3.15-3.22, bire=0.2800. |
RL Color: |
White to gray white, with a bluish tint, with deep blood-red internal reflections. |
Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Hematite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
32.00 |
34.50 |

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| 420 nm |
31.00 |
34.00 |

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| 440 nm |
30.00 |
33.50 |

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| 460 nm |
29.10 |
32.70 |

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| 480 nm |
28.40 |
32.20 |

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| 500 nm |
27.80 |
31.60 |

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| 520 nm |
27.20 |
31.00 |

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| 540 nm |
27.00 |
30.60 |

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| 560 nm |
26.80 |
30.40 |

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| 580 nm |
26.40 |
30.00 |

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| 600 nm |
25.50 |
29.20 |

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| 620 nm |
24.80 |
28.30 |

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| 640 nm |
24.10 |
27.50 |

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| 660 nm |
23.50 |
26.70 |

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| 680 nm |
23.10 |
26.10 |

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| 700 nm |
22.80 |
25.60 |

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Calculated Relative Intensity Colors of Hematite in Air
Relative Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
320% |
350% |
| R1 |
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| R2 |
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Calculated Properties of Hematite
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Electron Density: |
relectron=5.04 gm/cc note: rHematite =5.30 gm/cc. |
Fermion Index |
Fermion Index = 0.01497 Boson Index = 0.98503 |
Photoelectric: |
PEHematite = 21.37 barns/electron U=PEHematite x relectron= 107.83 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Hematite is Not Radioactive |
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Hematite Classification
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Dana Class: |
4.3.1.2 (4)Simple Oxides |
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(4.3)with a cation charge of 3+ (A+++2 O3) |
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(4.3.1)Corundum-Hematite group (Rhombohedral: R3¯c) |
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4.3.1.1 Corundum Al2O3 R 3c 3 2/m |
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4.3.1.2 Hematite Fe2O3 R 3c 3 2/m |
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4.3.1.3 Eskolaite Cr2O3 R 3c 3 2/m |
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4.3.1.4 Karelianite V2O3 R 3c 3 2/m |
Strunz Class: |
IV/C.04-20 IV - Oxides |
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IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds) |
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IV/C.04 - Hematite group |
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IV/C.04-10 Corundum Al2O3 R 3c 3 2/m |
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IV/C.04-20 Hematite Fe2O3 R 3c 3 2/m |
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IV/C.04-30 Eskolaite Cr2O3 R 3c 3 2/m |
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IV/C.04-40 Karelianite V2O3 R 3c 3 2/m |
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Other Hematite Information
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References: |
NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3) |
See Also: |
Links to other databases for Hematite :
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 - Philatelic Mineralogy
23 - Philatelic Mineralogy
24 -QUT Mineral Atlas
25 - Scandinavian mineral gallery
26 - Tradeshop.com - The Rainbow of Gems
27 -University of Colorado - Mineral Structure Data
28 - University of Manchester - Mineral Structure
29 -University of Minnesota
30 - WWW-MINCRYST
31 - YupRocks
32 -theimage
33 -École des Mines de Paris
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Hematite
Fe2O3
Dana No: 4.3.1.2 Strunz No: IV/C.04-20
Locality:
Notes:
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