Found in and around quartz-rhodochrosite-sulphide veinlets cross-cutting the rhodochrosite ore in greenschist-facies Lower Carboniferous radiolarite. Vanadoandrosite-(Ce) has domina nt V+++ in M1 site. Epidote group
IMA Status:
Approved IMA 2004 (Dana # Added)
Locality:
Vielle Aure mining district, central Pyrenees, France Link to MinDat.org Location Data.
Name Origin:
Named as the vanadiium analoge of androsite.
Synonym:
IMA2004-015
Vanadoandrosite-(Ce) Crystallography
Axial Ratios:
a:b:c =1.5458:1:1.7521
Cell Dimensions:
a = 8.856, b = 5.729, c = 10.038, Z = 2; beta = 113.088° V = 468.50 Den(Calc)= 4.12
CI calc= 0.084 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1893,KC= 0.2067 Ncalc = 1.85
Optical Data:
Biaxial (+/-), a=1.74, g=1.82, bire=0.0800
Calculated Properties of Vanadoandrosite-(Ce)
Electron Density:
Bulk Density (Electron Density)=3.91 gm/cc note: Specific Gravity of Vanadoandrosite-(Ce) =4.12 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEVanadoandrosite-(Ce) = 87.30 barns/electron U=PEVanadoandrosite-(Ce) x relectron= 341.43 barns/cc.
Radioactivity:
GRapi = 16,228.82 (Gamma Ray American Petroleum Institute Units)
Concentration of Vanadoandrosite-(Ce) per GRapi unit = 61.62 (PPM)
Vanadoandrosite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Radioactivity from Vanadoandrosite-(Ce) - weak
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 / 7.74 cm
359,012
9.70E-06
16,228.82
5.34
100 gm / 3.59 cm
35,901
9.70E-07
1,622.88
0.53
10 gm / 1.67 cm
3,590
9.70E-08
162.29
0.05
1 gm / 7.74 mm
359
9.70E-09
16.23
0.01
0.1 gm / 3.59 mm
36
9.70E-10
1.62
0.00
0.01 gm / 1.67 mm
4
9.70E-11
0.16
0.00
0.001 gm / 0.77 mm
0
9.70E-12
0.02
0.00
Weight of pure Vanadoandrosite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.12 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
Estimated Thorium Activity ( 0.80 % Th) From Sum REE Elements (16.00 % REE)
Vanadoandrosite-(Ce) Classification
Dana Class:
58.02.01c.10(58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups
(58.02)with cations in [6] and higher coordination; single and double groups (n=1,2)
Chemical Formula: 
- weak