Vanadoandrosite-(Ce) Mineral Data

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General Vanadoandrosite-(Ce) Information

Chemical Formula:

(Mn++,Ca)(REE)V+++AlMn++(Si2O7)(SiO4)O(OH)

Composition:

Molecular Weight = 580.77 gm

Strontium 1.66 % Sr 1.96 % SrO

Calcium 4.07 % Ca 5.70 % CaO

Lanthanum 3.59 % La 4.21 % La₂O₃

Cerium 9.41 % Ce 11.02 % Ce₂O₃

Samarium 0.52 % Sm 0.60 % Sm₂O₃

Magnesium 0.13 % Mg 0.21 % MgO

Titanium 0.08 % Ti 0.14 % TiO₂

Manganese 9.27 % Mn 11.97 % MnO

Aluminum 5.39 % Al 10.18 % Al₂O₃

Vanadium 9.74 % V 14.32 % V₂O₃

Iron 3.17 % Fe 2.85 % FeO / 1.37 % Fe₂O₃

Silicon 14.51 % Si 31.04 % SiO₂

Hydrogen 0.17 % H 1.55 % H₂O

Neodymium 2.48 % Nd 2.90 % Nd₂O₃

Oxygen 35.81 % O

______ ______

100.00 % 100.01 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺_0.62Ca_0.38Ce_0.39La_0.15Nd_0.1Sm_0.02Ca_0.21Sr_0.11V³⁺_0.8Al_0.16Mg_0.03Ti_0.01AlMn²⁺_0.36 V³⁺_0.31Fe²⁺_0.23Fe³⁺_0.1(OH)

Environment:

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

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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

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/m

Crystal Structure:

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Cenki-Tok B , Ragu A , Armbruster T , Chopin C , Medenbach O , European Journal of Mineralogy , 18 (2006) p.569-582, New Mn- and rare-earth-rich epidote-group minerals in metacherts:, manganiandrosite-(Ce) and vanadoandrosite-(Ce), Locality: Vielle Aure mining district, central Pyrenees, France

Physical Properties of Vanadoandrosite-(Ce)

Cleavage:

None

Color:

Dark brown, Black.

Diaphaneity:

Transparent

Luster:

Adamantine

Streak:

brown

Optical Properties of Vanadoandrosite-(Ce)

Gladstone-Dale:

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:

PE_{Vanadoandrosite-(Ce)}= 87.30 barns/electron
U=PE_{Vanadoandrosite-(Ce)} x r_electron= 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)

(58.02.01c)Epidote group (Allanite subgroup)

58.02.01c.01 Allanite-(Ce) (Ce,Ca,Y)2(Al,Fe)3(SiO4)3(OH) P 2₁/m 2/m

58.02.01c.02 Allanite-(La)! Ca(REE,Ca)Al2(Fe,Fe)(SiO4)(Si2O7)O(OH) P 2₁/m 2/m

58.02.01c.03 Allanite-(Y) (Y,Ce,Ca)2(Al,Fe)3(SiO4)3(OH) P 2₁/m 2/m

58.02.01c.04 Dissakisite-(Ce) Ca(Ce,REE)(Mg,Fe)(Al,Fe)2Si3O12(OH) P 2₁/m 2/m

58.02.01c.05 Dissakisite-(La)! (Ca,Fe,Th,La)(La,REE,Ca)(Al,Cr,Ti)2(Mg,Fe,Al)Si3O12(OH,F)withLa>Ce P 2₁/m 2/m

58.02.01c.06 Manganiandrosite-(La)! (Mn,Ca)(La,Ce,Ca,Nd)AlMnMn(SiO4)(Si2O7)O(OH) P 2₁/m 2/m

58.02.01c.07 Ferriallanite-(Ce)! CaCe(Fe,Fe,Al)3[SiO4][Si2O7]O(OH) P 2₁/m 2/m

58.02.01c.08 Vastmanlandite-(Ce)! (Ce,La)3CaAl2Mg2[Si2O7][SiO4]3F(OH)2 P 2₁/m 2/m

58.02.01c.09 Manganiandrosite-(Ce)! (Mn,Ca)(Ce,REE)AlMnMn(Si2O7)(SiO4)O(OH) P 2₁/m 2/m

58.02.01c.10 Vanadoandrosite-(Ce)! (Mn,Ca)(REE)VAlMn(Si2O7)(SiO4)O(OH) P 2₁/m 2/m

Strunz Class:

09.BG.05b 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BG -Sorosilicates with mixed SiO4 and Si2O7 groups;

09.BG.05b Allanite-(La)! Ca(REE,Ca)Al2(Fe,Fe)(SiO4)(Si2O7)O(OH) P 2₁/m 2/m

09.BG.05b Allanite-(Y) (Y,Ce,Ca)2(Al,Fe)3(SiO4)3(OH) P 2₁/m 2/m

09.BG.05b Allanite-(Ce) (Ce,Ca,Y)2(Al,Fe)3(SiO4)3(OH) P 2₁/m 2/m

09.BG.05b Manganiandrosite-(La)! (Mn,Ca)(La,Ce,Ca,Nd)AlMnMn(SiO4)(Si2O7)O(OH) P 2₁/m 2/m

09.BG.05b Dissakisite-(Ce) Ca(Ce,REE)(Mg,Fe)(Al,Fe)2Si3O12(OH) P 2₁/m 2/m

09.BG.05b Manganiandrosite-(Ce)! (Mn,Ca)(Ce,REE)AlMnMn(Si2O7)(SiO4)O(OH) P 2₁/m 2/m

09.BG.05b Vanadoandrosite-(Ce)! (Mn,Ca)(REE)VAlMn(Si2O7)(SiO4)O(OH) P 2₁/m 2/m

09.BG.05b Dissakisite-(La)! (Ca,Fe,Th,La)(La,REE,Ca)(Al,Cr,Ti)2(Mg,Fe,Al)Si3O12(OH,F)withLa>Ce P 2₁/m 2/m

09.BG.05b Ferriallanite-(Ce)! CaCe(Fe,Fe,Al)3[SiO4][Si2O7]O(OH) P 2₁/m 2/m

09.BG.05b Uedaite-(Ce)! MnCeAl2Fe(Si2O7)(SiO4)O(OH) P 2₁/m 2/m

Other Vanadoandrosite-(Ce) Information

References:

NAME( AmMin, v92:705) PHYS. PROP.(AmMin, v92:705) OPTIC PROP.(AmMin, v92:705)

See Also:

Links to other databases for Vanadoandrosite-(Ce) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info

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Vanadoandrosite-(Ce)

(Mn++,Ca)(REE)V+++AlMn++(Si2O7)(SiO4)O(OH)
Dana No: 58.02.01c.10 Strunz No: 09.BG.05b
Locality:

Notes: