Karibibite Mineral Data + 
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Dan Weinrich Fine Minerals
Full-time professional mineral dealer with over 31 years experience in mineral collecting
And 15 years selling mineral specimens on the internet and at major mineral shows
- 7.10.2.1 Karibibite Fe2As4(O,OH)9 Unk Ortho
- IV/J.07-10 Karibibite Fe2As4(O,OH)9 Unk Ortho
- IV/J.07-20 Ludlockite (Fe,Pb)As2O6 A1 1
- IV/J.07-20* Ludlockite-(Pb)* PbFe4As10O22 P1 1
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. | ||
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 |
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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: |
relectron=3.76 gm/cc |
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| Fermion Index |
Fermion Index = 0.00438 Boson Index = 0.99562 |
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| Photoelectric: |
PEKaribibite = 44.01 barns/electron |
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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: |
7.10.2.1 (7)Multiple Oxides | ||
| (7.10)Dana Type | |||
| (7.10.2)Dana Group | |||
| Strunz Class: |
IV/J.07-10 IV - Oxides | ||
| IV/J - Arsenides with [AsO3]3-, [AsO2]-, [As2O5]4- groups and unclassified Arsenides | |||
| IV/J.07 - Karibibite - Ludlockite series | |||
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 - Google Images 6 - Google Scholar 7 - Handbook of Mineralogy (MinSocAm) 8 - Handbook of Mineralogy (UofA) 9 - MinDAT 10 - MinMax(Deutsch) 11 - MinMax(English) 12 - Mineralienatlas (Deutsch) 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Karibibite using: Visit our Advertisers for Karibibite : AA Mineral SpecimensB & L Fine Minerals Dan Weinrich Fine Minerals Dan Weinrich Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals The GeoZone Wrights Rock Shop Translate Karibibite Mineral Data : Ask about Karibibite here : Print or Cut-and-Paste your Karibibite Specimen Label here :
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