Radiobarite Mineral Data

General Radiobarite Information

Chemical Formula:

(Ba,Ra)SO4

Composition:

Molecular Weight = 233.40 gm

Barium 58.83 % Ba 65.69 % BaO

Radium 0.01 % Ra 0.01 % RaO

Sulfur 13.74 % S 34.30 % SO₃

Oxygen 27.42 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ba_0.99Ra_0.0001(SO₄)

Environment:

Highly radioactive secondary mineral formed in the oxidized zone of sediment-hosted uranium deposits.

IMA Status:

Not Submitted IMA

Locality:

Section 23 mine, Grants, New Mexico. Link to MinDat.org Location Data.

Name Origin:

From radium replacing barium and from the Greek, baryos, "heavy."

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Radiobarite Crystallography

Axial Ratios:

a:b:c =1.6289:1:1.3122

Cell Dimensions:

a = 8.878, b = 5.45, c = 7.152, Z = 4; V = 346.05 Den(Calc)= 4.48

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m)

Physical Properties of Radiobarite

Cleavage:

{010} Perfect, {210} Perfect, [010} Imperfect

Color:

White, Yellowish white.

Density:

4.48

Diaphaneity:

Transparent to translucent to opaque

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Massive - Fibrous - Distinctly fibrous fine-grained forms.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Radiobarite

Gladstone-Dale:

CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1428,KPDmeas= 0.1428,KC= 0.1448
Ncalc = 1.65

Optical Data:

Biaxial (+), a=1.634-1.637, b=1.6355-1.638, g=1.646-1.648, bire=0.0110-0.0120, 2V(Calc)=36-42, 2V(Meas)=36-40. Dispersion weak, r < v.

Calculated Properties of Radiobarite

Electron Density:

Bulk Density (Electron Density)=3.99 gm/cc
note: Specific Gravity of Radiobarite =4.48 gm/cc.

Fermion Index:

Fermion Index = 0.1
Boson Index = 0.9

Photoelectric:

PE_Radiobarite= 265.73 barns/electron
U=PE_Radiobarite x r_electron=1,060.97 barns/cc.

Radioactivity:

GRapi = 1352106239.53 (Gamma Ray American Petroleum Institute Units)
Concentration of Radiobarite per GRapi unit = 0.74 (PPB)

Radiobarite 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) 0.02 ± 0.01 grams of pure Radiobarite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 2.25 ± 0.56 grams of pure Radiobarite .

**Estimated Radioactivity from Radiobarite** - dangerous
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Becquerels (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 7.53 cm	31,860,550,776	8.61E-01	1352106239.53	444,528.08
100 gm / 3.49 cm	3,186,055,078	8.61E-02	135,210,623.95	44,452.81
10 gm / 1.62 cm	318,605,508	8.61E-03	13,521,062.40	4,445.28
1 gm / 7.53 mm	31,860,551	8.61E-04	1,352,106.24	444.53
0.1 gm / 3.49 mm	3,186,055	8.61E-05	135,210.62	44.45
0.01 gm / 1.62 mm	318,606	8.61E-06	13,521.06	4.45
0.001 gm / 0.75 mm	31,861	8.61E-07	1,352.11	0.44

Weight of pure Radiobarite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.48 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

Radiobarite Classification

Dana Class:

28.00.00.00 (28)Sulfate Minerals

(28.00)Without Dana Classification Numbers

(28.00.00)Barite Group

28.00.00.00 Adranosite (NH4)4NaAl2(SO4)4Cl(OH)2 I 4₁/acd 4mm

28.00.00.00 Blakeite Fe2(TeO3)3 Cubic ? Cubic

28.00.00.00 IMA2008-029 (NH4)3Fe(SO4)3 R 3c 3m

28.00.00.00 IMA2008-040 BiMo2O7(OH)•2H2O P 2₁/m 2/m

28.00.00.00 Radiobarite* (Ba,Ra)SO4 2/m 2/m 2/m

28.00.00.00 Zincosite* ZnSO4 Unk Ortho

Strunz Class:

07.AD.35 07 - SULFATES (SELENATES, TELLURATES)

07.A - Sulfates (selenates, etc.) without Additional Anions, without H2O

07.AD -With only large cations

07.AD.35 Anglesite PbSO4 Pbnm 2/m 2/m 2/m

07.AD.35 Barite BaSO4 Pbnm 2/m 2/m 2/m

07.AD.35 Celestine SrSO4 Pbnm 2/m 2/m 2/m

07.AD.35 Olsacherite Pb2(SeO4)(SO4) P 2212 2 2 2

07.AD.35 Radiobarite* (Ba,Ra)SO4 2/m 2/m 2/m

Other Radiobarite Information

See Also:

Links to other databases for Radiobarite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
11 - Uranium Minerals

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Print or Cut-and-Paste your Radiobarite Specimen Label here :

Radiobarite

(Ba,Ra)SO4
Dana No: 28.00.00.00 Strunz No: 07.AD.35
Locality:

Notes: