Calciobetafite Mineral Data
General Calciobetafite Information
Chemical Formula:
Ca2(Ti,Nb)2(O,OH)7
Composition:
Molecular Weight = 394.30 gm
Calcium 15.25 % Ca 21.33 % CaO
La,Ce,Pr,Nd,Sm, 7.30 % RE 8.52 % REE2 O3
Thorium 5.88 % Th 6.70 % ThO2
Uranium 6.04 % U 6.85 % UO2
Titanium 9.71 % Ti 16.21 % TiO2
Niobium 28.27 % Nb 40.45 % Nb2 O5
Iron 1.42 % Fe 1.82 % FeO
Hydrogen 0.08 % H 0.69 % H2 O
Oxygen 25.56 % O
Fluorine 0.48 % F 0.48 % F
- %
F -0.20 % -O=F2
______ ______
100.00 % 102.84 % = TOTAL OXIDE
Empirical Formula:
Ca1.5 REE0.2 Th0.1 U0.1 Nb1.2 Ti0.8 Fe2+ 0.1 O6 (OH)0.3 F0.1
Environment:
In a subvolcanic rock, locally termed "sanidinite", present in a phreatomagmatic explosion breccia.
IMA Status:
Approved IMA 1983
Locality:
From Monte di Procida, Campi Flegrei, near Naples, Campania, Italy. Link to MinDat.org Location Data.
Name Origin:
For the mineral with the betafite structure and the CALCIum content.
Name Pronunciation:
Calciobetafite + Pronunciation
Synonym:
ICSD 31196
PDF 42-2
Calciobetafite Crystallography
Cell Dimensions:
a = 10.2978, Z = 8; V = 1,092.03 Den(Calc)= 4.80
Crystal System:
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
X Ray Diffraction:
By Intensity(I/Io ): 2.973(1), 1.82(0.53), 1.552(0.45),
Physical Properties of Calciobetafite
Color:
Reddish brown.
Density:
4.2 - 4.5, Average = 4.34
Diaphaneity:
Subtranslucent to Opaque
Fracture:
Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.
Habit:
Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Hardness:
4.5-5.5 - Near Apatite
Luster:
Resinous
Optical Properties of Calciobetafite
Optical Data:
Isotropic.
NCalc= 2.21 - from Gladstone-Dale relationship (KC = 0.252) where Ncalc =Dcalc *KC +1 NCalc= 2.1 - from Gladstone-Dale relationship (KC = 0.252) where Ncalc =Dmeas *KC +1
Calculated Properties of Calciobetafite
Electron Density:
Bulk Density (Electron Density)=4.42 gm/cc note: Specific Gravity of Calciobetafite =4.80 gm/cc.
Fermion Index:
Fermion Index = 0.02 Boson Index = 0.98
Photoelectric:
PECalciobetafite = 375.93 barns/electronU=PECalciobetafite x r electron =1,660.33 barns/cc.
Radioactivity:
GRapi = 588,996.74 (Gamma Ray American Petroleum Institute Units)
Concentration of Calciobetafite per GRapi unit =1,697.80 (PPB)
Calciobetafite 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)
51.64 ± 12.91 grams of pure Calciobetafite .
Estimated Maximum U.S. Postal Shipping Size
(10 mRem/hr limit, Unshielded 100 cm box)
5164.1 ±1291.0 grams of pure Calciobetafite .
Estimated Radioactivity from Calciobetafite - 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 / 7.36 cm
13,442,809
3.63E-04
588,996.74
193.64
100 gm / 3.41 cm
1,344,281
3.63E-05
58,899.67
19.36
10 gm / 1.58 cm
134,428
3.63E-06
5,889.97
1.94
1 gm / 7.36 mm
13,443
3.63E-07
589.00
0.19
0.1 gm / 3.41 mm
1,344
3.63E-08
58.90
0.02
0.01 gm / 1.58 mm
134
3.63E-09
5.89
0.00
0.001 gm / 0.74 mm
13
3.63E-10
0.59
0.00
Weight of pure Calciobetafite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.80 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
Calciobetafite Classification
Dana Class:
08.02.03.05 (08) Multiple Oxides with Nb, Ta, and Ti
(08.02) where (A)2 (B2O6) (O,OH,F)
(08.02.03) Pyrochlore Group (Betafite Subgroup; 2(Ti)>(Ta+Nb)
08.02.03.01 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
08.02.03.02 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
08.02.03.03 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m
08.02.03.04 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m
08.02.03.05 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m
Strunz Class:
04.DH.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
04.D - Metal:Oxygen = 1:2 and similar
04.DH -With large (� medium-sized) cations; sheets of edge-sharing octahedra
04.DH.15 Alumotungstite (W,Al)(O,OH)3(?) Unk Cubic
04.DH.15 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
04.DH.15 Ferritungstite (K,Ca,Na)(W,Fe)2(O,OH)6•(H2O) F d3m 4/m 3 2/m
04.DH.15 Cesstibtantite (Cs,Na)SbTa4O12 F d3m 4/m 3 2/m
04.DH.15 Bismutomicrolite (Bi,Ca)(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m
04.DH.15 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m
04.DH.15 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m
04.DH.15 Bariomicrolite Ba(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m
04.DH.15 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m
04.DH.15 Jixianite Pb(W,Fe)2(O,OH)7 F d3m 4/m 3 2/m
04.DH.15 Plumbomicrolite (Pb,Ca,U)2Ta2O6(OH) F d3m 4/m 3 2/m
04.DH.15 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6•(H2O,K) F d3m 4/m 3 2/m
04.DH.15 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m
04.DH.15 Strontiopyrochlore * Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m
04.DH.15 Uranmicrolite (U,Ca)2(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m
04.DH.15 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m
04.DH.15 Microlite (Na,Ca)2Ta2O6(O,OH,F) F d3m 4/m 3 2/m
04.DH.15 Natrobistantite (Na,Cs)Bi(Ta,Nb,Sb)4O12 F d3m 4/m 3 2/m
04.DH.15 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m
04.DH.15 Stibiomicrolite (Sb,Ca,Na)2(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m
04.DH.15 Stannomicrolite (Sn,Fe,Mn)(Ta,Nb,Sn)2(O,OH)7 F d3m 4/m 3 2/m
04.DH.15 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m
04.DH.15 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m
04.DH.15 Bismutopyrochlore ! (Bi,U,Ca,Pb)1x(Nb,Ta)2O6(OH)•n(H2O) F d3m 4/m 3 2/m
04.DH.15 Fluornatromicrolite ! (Na,Ca,Bi)2Ta2O6F F d3m 4/m 3 2/m
04.DH.15 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
04.DH.15 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3
04.DH.15 Elsmoreite ! WO3•0.5(H2O) F d3m 4/m 3 2/m
Other Calciobetafite Information
References:
NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
See Also:
Links to other databases for Calciobetafite :
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
16 - WWW-MINCRYST
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Calciobetafite
Ca2(Ti,Nb)2(O,OH)7
Dana No: 08.02.03.05 Strunz No: 04.DH.15
Locality:
Notes:
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