Thorosteenstrupine Mineral Data

General Thorosteenstrupine Information

Chemical Formula: (Ca,Th,Mn)3Si4O11F•6(H2O) Composition: Molecular Weight = 712.88 gm    Calcium    10.12 %  Ca   14.16 % CaO    Thorium    29.29 %  Th   33.33 % ThO₂    Manganese   2.31 %  Mn    2.99 % MnO    Silicon    15.76 %  Si   33.71 % SiO₂    Hydrogen    1.70 %  H    15.16 % H₂O    Oxygen     38.15 %  O    Fluorine    2.67 %  F     2.67 % F                 -   %   F    -1.12 % -O=F₂                  ______        ______               100.00 %      100.90 % = TOTAL OXIDE Empirical Formula: Ca_1.8Th_0.9Mn²⁺_0.3Si₄O₁₁F•6(H₂O) Environment: Metasomatic veins associated with orthoclase. IMA Status: Approved IMA 1962 Locality: Unspecified locality in eastern Siberia, Russia. Link to MinDat.org Location Data. Name Origin: Named for steenstrupine and the thorium content. Name Pronunciation: Thorosteenstrupine + Pronunciation  

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Thorosteenstrupine Crystallography

Crystal System: Amorphous- No Crystals X Ray Diffraction: By Intensity(I/I_o): 2.61(1), 3.25(1), 4.08(1),  

Physical Properties of Thorosteenstrupine

Color: Dark brown, Black, Black brown. Density: 3.02 Diaphaneity: Translucent to Opaque Hardness: 4 - Fluorite Luster: Vitreous - Greasy Streak: dark brown  

Optical Properties of Thorosteenstrupine

Gladstone-Dale: CI meas= 0.003 (Superior) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2136,KC= 0.2142
Ncalc = 1.65 Optical Data: Isotropic, n=1.63-1.66.  

Calculated Properties of Thorosteenstrupine

Electron Density: Bulk Density (Electron Density)=2.86 gm/cc
note: Specific Gravity of Thorosteenstrupine =3.02 gm/cc.
Fermion Index: Fermion Index = 0.0076819759
Boson Index = 0.9923180241 Photoelectric: PE_{Thorosteenstrupine} = 653.40 barns/electron
U=PE_{Thorosteenstrupine} x r_electron=1,868.42 barns/cc.
Radioactivity:

GRapi = 591,738.05 (Gamma Ray American Petroleum Institute Units)
Concentration of Thorosteenstrupine per GRapi unit =1,689.94 (PPB)

Thorosteenstrupine 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) 51.40 ± 12.85 grams of pure Thorosteenstrupine .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 5140.2 ±1285.1 grams of pure Thorosteenstrupine .

Estimated Radioactivity from Thorosteenstrupine - strong

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 / 8.58 cm	13,123,885	3.55E-04	591,738.05	194.54
100 gm / 3.98 cm	1,312,389	3.55E-05	59,173.81	19.45
10 gm / 1.85 cm	131,239	3.55E-06	5,917.38	1.95
1 gm / 8.58 mm	13,124	3.55E-07	591.74	0.19
0.1 gm / 3.98 mm	1,312	3.55E-08	59.17	0.02
0.01 gm / 1.85 mm	131	3.55E-09	5.92	0.00
0.001 gm / 0.86 mm	13	3.55E-10	0.59	0.00

Weight of pure Thorosteenstrupine in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.02 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

 

Thorosteenstrupine Classification

Dana Class: 61.04.02.02 (61)Cyclosilicate Six-Membered Rings   (61.04)with other anions   (61.04.02)Steenstrupine group  

61.04.02.01 Steenstrupine-(Ce) Na14Ce6MnMnFe2(Zr,Th)(Si6O18)2(PO4)7•3(H2O) R 3m 3 2/m

 

61.04.02.02 Thorosteenstrupine (Ca,Th,Mn)3Si4O11F•6(H2O) None

Strunz Class: 09.CK.20 09 - SILICATES (Germanates)   09.C - Cyclosilicates   09.CK -[Si6O18]12- 6-membered single rings, with insular complex anions  

09.CK.20 Thorosteenstrupine (Ca,Th,Mn)3Si4O11F•6(H2O) None

 

09.CK.20 Steenstrupine-(Ce) Na14Ce6MnMnFe2(Zr,Th)(Si6O18)2(PO4)7•3(H2O) R 3m 3 2/m

 

Other Thorosteenstrupine Information

References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) See Also: Links to other databases for Thorosteenstrupine :
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
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