General Rameauite Information Chemical Formula: |
K2CaU++++++6O20•9(H2O) |
Composition: |
Molecular Weight = 2,028.57 gm |
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Potassium 3.85 % K 4.64 % K2O |
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Calcium 1.98 % Ca 2.76 % CaO |
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Uranium 70.40 % U 84.60 % UO3 |
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Hydrogen 0.89 % H 7.99 % H2O |
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Oxygen 22.87 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
K2CaU6O20•9(H2O) |
Environment: |
On pitchblende. |
IMA Status: |
Approved IMA 1972 |
Locality: |
Margnac uranium deposit, Haute Vienne, Massif Central, France. Link to MinDat.org Location Data. |
Name Origin: |
Named for Jacques Rameau (1926-1960), French prospector who discovered the deposit where the mineral occurs. |
Name Pronunciation: |
Rameauite + Pronunciation |
| | Rameauite Image
Images:
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Rameauite Crystallography Axial Ratios: |
a:b:c =0.9796:1:0.9971 |
Cell Dimensions: |
a = 13.97, b = 14.26, c = 14.22, Z = 4; beta = 121.02° V = 2,427.67 Den(Calc)= 5.55 |
Crystal System: |
MonoclinicSpace Group: C 2/c,Cc |
X Ray Diffraction: |
By Intensity(I/Io): 3.319(1), 3.495(1), 7.12(1), |
| Physical Properties of Rameauite Cleavage: |
{010} Good |
Color: |
Orange. |
Density: |
5.6 |
Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
Habit: |
Pseudo Hexagonal - Crystals show a hexagonal outline. |
| Optical Properties of Rameauite Gladstone-Dale: |
CI meas= -0.208 (Poor) - where the CI = (1-KPDmeas/KC) |
CI calc= -0.219 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.173,KPDmeas= 0.1714,KC= 0.1419 Ncalc = 1.79 Optical Data: |
Biaxial (?), b=1.95, g=1.97, , 2V(Meas)=32. |
| Calculated Properties of Rameauite Electron Density: |
Bulk Density (Electron Density)=4.75 gm/cc |
note: Specific Gravity of Rameauite =5.60 gm/cc. Fermion Index: |
Fermion Index = 0.0052114308 |
Boson Index = 0.9947885692 Photoelectric: |
PERameauite =1,884.57 barns/electron |
U=PERameauite x relectron=8,948.23 barns/cc. Radioactivity: |
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GRapi = 5,088,217.22 (Gamma Ray American Petroleum Institute Units)
Rameauite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram. Estimated Maximum U.S. Postal Shipping Size
(10 mRem/hr limit, Unshielded 10 cm box)
5.98 ± 1.49 grams of pure Rameauite .
Weight of pure Rameauite in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.60 gm/cc.* | Rameauite Classification Dana Class: |
05.05.02.01 (05)Oxides Containing Uranium and Thorium |
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(05.05)with alkaline and alkaline-earth elements (hydrated) |
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(05.05.02)Dana Group |
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Strunz Class: |
04.GB.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.G - Uranyl Hydroxides |
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04.GB -With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra |
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| Other Rameauite Information References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) |
See Also: |
Links to other databases for Rameauite : |
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 15 - Uranium Minerals Search for Rameauite using: Visit our Advertisers for Rameauite : A Bijoux Google Search for RameauiteAdam's Minerals Google Search for Rameauite Cape Minerals Google Search for Rameauite Dakota Matrix Minerals Google Search for Rameauite Excalibur Mineral Corp. Google Search for Rameauite Exceptional Minerals Google Search for Rameauite John Betts Fine Minerals Search for Rameauite McDougall Minerals Google Search for Rameauite Mineral News Website Link Rock and Mineral Shows Google Search for Rameauite Weinrich Minerals, Inc. Google Search for Rameauite Ask about Rameauite here : Print or Cut-and-Paste your Rameauite Specimen Label here :
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