Bernalite Mineral Data + 
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- 6.3.5.1 Dzhalindite In(OH)3 I m3 2/m 3
- 6.3.5.2 Sohngeite Ga(OH)3 I m3 2/m 3
- 6.3.5.3 Bernalite Fe(OH)3 I mmm 2/m 2/m 2/m
- IV/F.15-10 Sohngeite Ga(OH)3 I m3 2/m 3
- IV/F.15-20 Dzhalindite In(OH)3 I m3 2/m 3
- IV/F.15-30 Bernalite Fe(OH)3 I mmm 2/m 2/m 2/m
General Bernalite Information |
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 Chemical Formula: |
Fe(OH)3 | ||
| Composition: |
Molecular Weight = 106.87 gm | ||
| Iron 52.26 % Fe 74.71 % Fe2O3 | |||
| Hydrogen 2.83 % H 25.29 % H2O | |||
| Oxygen 44.91 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Fe3+(OH)3 | ||
| Environment: |
On a museum specimen from a metamorphosed Pb-Zn deposit, probably from the surface oxidation zone. | ||
| IMA Status: |
Approved IMA 1993 | ||
| Locality: |
From the Proprietary mine, Broken Hill, New South Wales, Australia. Link to MinDat.org Location Data. | ||
| Name Origin: |
To honor John Desmond Bernal (1901-1971), eminent British crystallographer and historian of science. | ||
| Synonym: |
ICSD 73441 | ||
| PDF 46-1436 | |||
Search for Bernalite Images | |||
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Images:
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Bernalite Crystallography |
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| Axial Ratios: |
a:b:c =0.9978:1:0.9997 | ||
| Cell Dimensions: |
a = 7.544, b = 7.56, c = 7.558, Z = 8; V = 431.05 Den(Calc)= 3.29 | ||
| Crystal System: |
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: I mmm | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.784(1), 1.692(0.17), 2.393(0.16), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Bernalite |
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| Cleavage: |
None | ||
| Color: |
Yellow green, Dark bottle green. | ||
| Density: |
3.32 | ||
| Diaphaniety: |
Transparent to Translucent | ||
| Hardness: |
4 - Fluorite | ||
| Luster: |
Vitreous - Resinous | ||
| Streak: |
apple green | ||
Optical Properties of Bernalite |
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| Gladstone-Dale: |
CI meas= 0.128 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.12 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2827,KPDmeas= 0.2801,KC= 0.3213 |
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| Optical Data: |
Biaxial (?), b=1.92-1.94 | ||
Calculated Properties of Bernalite |
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| Electron Density: |
relectron=3.26 gm/cc |
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| Fermion Index |
Fermion Index = 0.01129 Boson Index = 0.98871 |
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| Photoelectric: |
PEBernalite = 15.43 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Bernalite is Not Radioactive |
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Bernalite Classification |
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| Dana Class: |
6.3.5.3 (6)Hydroxides and Oxides Containing Hydroxyl | ||
| (6.3)with (OH)3 or (OH)6 groups | |||
| (6.3.5)Dana Group | |||
| Strunz Class: |
IV/F.15-30 IV - Oxides | ||
| IV/F - Hydroxides and oxidic hydrates, water-bearing oxides with layered structure | |||
| IV/F.15 - Söhngeite - Bernalite series | |||
Other Bernalite Information |
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| References: |
NAME( AntBidBlaNic3) PHYS. PROP.(Am.Min.,Vol.78,p827-834,1993) OPTIC PROP.(Am.Min.,Vol.78,p827-834,1993) | ||
| See Also: |
Links to other databases for Bernalite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris Search for Bernalite using: Visit our Advertisers for Bernalite : Translate Bernalite Mineral Data : Ask about Bernalite here : Print or Cut-and-Paste your Bernalite Specimen Label here :
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