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General Karibibite Information |
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 Chemical Formula: |
Fe+++2As+++4(O,OH)9 | ||
| Composition: |
Molecular Weight = 556.38 gm | ||
| Iron 20.08 % Fe 28.70 % Fe2O3 | |||
| Arsenic 53.86 % As 71.12 % As2O3 | |||
| Hydrogen 0.18 % H 1.62 % H2O | |||
| Oxygen 25.88 % O | |||
| ______ ______ | |||
| 100.00 % 101.44 % = TOTAL OXIDE | |||
| Empirical Formula: |
Fe3+2As4O8(OH) | ||
| Environment: |
In vugs in loellingite. | ||
| IMA Status: |
Approved IMA 1973 | ||
| Locality: |
Karibib lithium pegmatite, Namibia. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality. | ||
| Name Pronunciation: |
Karibibite + Pronunciation  |
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Karibibite Image | |||
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Images:
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Karibibite Crystallography |
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| Axial Ratios: |
a:b:c =4.2741:1:1.1026 | ||
| Cell Dimensions: |
a = 27.91, b = 6.53, c = 7.2, Z = 6; V = 1,312.22 Den(Calc)= 4.22 | ||
| Crystal System: |
OrthorhombicSpace Group: Unk | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.384(1), 2.808(0.8), 3.176(0.8), | ||
Physical Properties of Karibibite |
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| Color: |
Brownish yellow. | ||
| Density: |
4.07 | ||
| Habit: |
Fibrous - Crystals made up of fibers. | ||
| Hardness: |
1-2 - Between Talc and Gypsum | ||
| Luminescence: |
Fluorescent, Short UV=yellow. | ||
| Magnetism: |
Paramagnetic | ||
| Streak: |
light yellow | ||
Optical Properties of Karibibite |
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| Gladstone-Dale: |
CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.051 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2496,KPDmeas= 0.2588,KC= 0.263 Ncalc = 2.07 - 2.11 |
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| Optical Data: |
Biaxial (-), a=1.96, b=2.1, g=2.1, bire=0.1400 | ||
| Pleochroism (x): |
straw yellow. | ||
| Pleochroism (y): |
straw yellow. | ||
| Pleochroism (z): |
light brownish yellow. | ||
Calculated Properties of Karibibite |
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| Electron Density: |
Bulk Density (Electron Density)=3.76 gm/cc note: Specific Gravity of Karibibite =4.07 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.0043804028 Boson Index = 0.9956195972 |
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| Photoelectric: |
PEKaribibite = 44.01 barns/electron U=PEKaribibite x rElectron Density= 165.47 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Karibibite is Not Radioactive |
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Karibibite Classification |
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| Dana Class: |
07.10.02.01 (07)Multiple Oxides | ||
| (07.10)Dana Type | |||
| (07.10.02)Dana Group | |||
| Strunz Class: |
04.JA.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate | ||
| 04.J - Arsenites, Antimonites, Bismuthites, Sulfites, | |||
| 04.JA -Arsenites, antimonites, bismuthites; without additional anions, without H2O | |||
Other Karibibite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | ||
| See Also: |
Links to other databases for Karibibite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Karibibite using: Visit our Advertisers for Karibibite : A Bijoux Google Search for KaribibiteAdam's Minerals Google Search for Karibibite Cape Minerals Google Search for Karibibite Dakota Matrix Minerals Google Search for Karibibite Excalibur Mineral Corp. Google Search for Karibibite Exceptional Minerals Google Search for Karibibite John Betts Fine Minerals Search for Karibibite McDougall Minerals Google Search for Karibibite Mineral News Website Link Rock and Mineral Shows Google Search for Karibibite Weinrich Minerals, Inc. Google Search for Karibibite Ask about Karibibite here : Print or Cut-and-Paste your Karibibite Specimen Label here :
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