Thorosteenstrupine Mineral Data

Thorosteenstrupine Mineral Data +

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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.

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Thorosteenstrupine Crystallography

Crystal System:

Amorphous- No Crystals

$Help on X Ray Diffraction:$ 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

Diaphaniety:

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

Optical Data:

Isotropic, n=1.63-1.66.

Calculated Properties of Thorosteenstrupine

Electron Density:

r_electron=2.86 gm/cc
note: r_{Thorosteenstrupine}=3.02 gm/cc.

Fermion Index

Fermion Index = 0.00768
Boson Index = 0.99232

Photoelectric:

PE_{Thorosteenstrupine}= 653.40 barns/electron
U=PE_{Thorosteenstrupine} x r_electron=1,868.42 barns/cc.

Radioactivity:

GRapi = 591,737.65 (Gamma Ray American Petroleum Institute Units)

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 Bequerols (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	13,123,882	3.55E-04	591,737.65	194.54
100 gm / 3.98 cm	1,312,388	3.55E-05	59,173.77	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:

61.4.2.2 (61)Cyclosilicate Six-Membered Rings

(61.4)with other anions

(61.4.2)Steenstrupine group

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

61.4.2.2 Thorosteenstrupine (Ca,Th,Mn)3Si4O11F·6(H2O) None

Strunz Class:

VIII/E.18-10 VIII - Silicates

VIII/E - Cyklosilicates, six rings [Si6O18]12-

VIII/E.18 - Thorosteenstrupine series

VIII/E.18-10 Thorosteenstrupine (Ca,Th,Mn)3Si4O11F·6(H2O) None

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - Uranium Minerals 14 -École des Mines de Paris

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Thorosteenstrupine

(Ca,Th,Mn)3Si4O11F·6(H2O)
Dana No: 61.4.2.2 Strunz No: VIII/E.18-10
Locality:

Notes: