Rabejacite Mineral Data + Say RABEJACITE

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General Rabejacite Information
Help on Chemical Formula: Chemical Formula: Ca(UO2)4(SO4)2(OH)6·6(H2O)
Help on Composition: Composition: Molecular Weight = 1,522.45 gm
   Calcium    2.63 %  Ca    3.68 % CaO
   Uranium   62.54 %  U    70.95 % UO2
   Hydrogen   1.19 %  H    10.65 % H2O
   Sulfur     4.21 %  S    10.52 % SO3
   Oxygen    29.43 %  O
            ______        ______ 
            100.00 %       95.80 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca(UO2)4(SO4)2(OH)6·6(H2O)
Help on Environment: Environment: Associated with gypsum and other secondary uranium minerals as an alteration product of pitchblende.
Help on IMA Status: IMA Status: Approved IMA 1993
Help on Locality: Locality: Rabejac and Mas d'Alary village a few kilometers from Lodeve, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: IMA1992-043
 

Rabejacite Image

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Rabejacite

Comments: Yellow rabejacite grains on matrix.
Location: Mas d'Alary, Lod?ve, H?rault, Languedoc-Roussillon, France. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Rabejacite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.5108:1:0.9198
Help on Cell Dimensions: Cell Dimensions: a = 8.73, b = 17.09, c = 15.72, Z = 4; V = 2,345.36 Den(Calc)= 4.31
Help on Crystal System: Crystal System: OrthorhombicSpace Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.9(1), 3.49(0.8), 3.38(0.7),
 

Physical Properties of Rabejacite

Help on Cleavage: Cleavage: None
Help on Color: Color: Yellow, Amber yellow.
Help on Density: Density: 4.1
Help on Diaphaniety: Diaphaniety: Transparent to Translucent
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Nodular - Tuberose forms having irregular protuberances over the surface.
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: Fluorescent, Short UV=light yellow, Long UV=light yellow.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Rabejacite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.27 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.208 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1613,KPDmeas= 0.1695,KC= 0.1335
Help on Optical Data: Optical Data: Biaxial (-), a=1.617, b=1.71, g=1.758, bire=0.1410, 2V(Calc)=68, 2V(Meas)=68. Dispersion r > v weak.
Help on Pleochroism (x): Pleochroism (x): pale yellow.
Help on Pleochroism (y): Pleochroism (y): pale yellow.
Help on Pleochroism (z): Pleochroism (z): sulfur yellow.
 

Calculated Properties of Rabejacite

Help on Electron Density: Electron Density:

relectron=3.75 gm/cc
note: rRabejacite =4.31 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00499
Boson Index = 0.99501
Help on Photoelectric: Photoelectric:

PERabejacite =1,632.20 barns/electron
U=PERabejacite x relectron=6,117.79 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,635,795.08 (Gamma Ray American Petroleum Institute Units)

Rabejacite 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) 6.56 ± 1.64 grams of pure Rabejacite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 656.13 ±164.03 grams of pure Rabejacite .

Estimated Radioactivity from Rabejacite - very strong
Specimen
Size
Weight/Volume
(Sphere) *		 Calculated
Activity
Bequerols
(Bq)		 Calculated
Activity
Curies (Ci)		 Estimated
Activity
GR(api)		 Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 7.62 cm 111,943,575 3.03E-03 4,635,795.08 1,524.10
100 gm / 3.54 cm 11,194,358 3.03E-04 463,579.51 152.41
10 gm / 1.64 cm 1,119,436 3.03E-05 46,357.95 15.24
1 gm / 7.62 mm 111,944 3.03E-06 4,635.80 1.52
0.1 gm / 3.54 mm 11,194 3.03E-07 463.58 0.15
0.01 gm / 1.64 mm 1,119 3.03E-08 46.36 0.02
0.001 gm / 0.76 mm 112 3.03E-09 4.64 0.00

Weight of pure Rabejacite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.31 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
 

Rabejacite Classification
Help on Dana Class: Dana Class: 31.6.8.1 (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.6)where (A+ B++)5 (XO4)2 Zq·x(H2O)
  (31.6.8)Dana Group
 
31.6.8.1 Rabejacite Ca(UO2)4(SO4)2(OH)6·6(H2O) Unk Ortho
Help on Strunz Class: Strunz Class: VI/D.20-90 VI - Sulfates,Chromates,Molybdates and Tungstates
  VI/D - Uranylsulfates [UO2]4+ - [SO4]2-
  VI/D.20 - Uranopilite - Rabejacite series
 
VI/D.20-05 Jachymovite! (UO2)8(SO4)(OH)14·13(H2O) P 21,P 21/m Mono
 
VI/D.20-10 Uranopilite [(UO2)6(SO4)O2(OH)6(H2O)6]·8(H2O) P1 1
 
VI/D.20-20 Meta-uranopilite (UO2)6(SO4)(OH)10·5(H2O) Unk Ortho
 
VI/D.20-30 Sodium-zippeite Na4(UO2)6(SO4)3(OH)10·4(H2O) Unk Ortho
 
VI/D.20-40 Zippeite K4(UO2)6(SO4)3(OH)10·4(H2O) C 2/m 2/m
 
VI/D.20-50 Magnesium-zippeite Mg(H2O)3.5(UO2)2(SO4)O2 C 2/m 2/m
 
VI/D.20-60 Cobalt-zippeite Co2(UO2)6(SO4)3(OH)10·16(H2O) Unk Ortho
 
VI/D.20-70 Nickel-zippeite Ni2(UO2)6(SO4)3(OH)10·16(H2O) Unk Ortho
 
VI/D.20-80 Zinc-zippeite Zn2(UO2)6(SO4)3(OH)10·16(H2O) Unk Ortho
 
VI/D.20-85 Deliensite! Fe(UO2)2(SO4)2(OH)2·3(H2O) Pnnm or Pnn2 Ortho
 
VI/D.20-90 Rabejacite Ca(UO2)4(SO4)2(OH)6·6(H2O) Unk Ortho
 

Other Rabejacite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Rabejacite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - Uranium Minerals 13 -École des Mines de Paris

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Rabejacite

Ca(UO2)4(SO4)2(OH)6·6(H2O)
Dana No: 31.6.8.1 Strunz No: VI/D.20-90
Locality:

 

Notes:

 
 
   
 
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