Thorogummite Mineral Data + Say THOROGUMMITE


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General Thorogummite Information

Help on Chemical  Formula: Chemical Formula: Th(SiO4)1-x(OH)4x
Help on Composition: Composition: Molecular Weight = 321.72 gm
   Thorium   72.13 %  Th   82.07 % ThO2
   Silicon    7.86 %  Si   16.81 % SiO2
   Hydrogen   0.13 %  H     1.12 % H2O
   Oxygen    19.89 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Th(SiO4)0.9(OH)0.4
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1889
Help on Locality: Locality: Llano County, Texas, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after gummite and the element thorium.
Help on Synonym: Synonym: Mackintoshite
 

Thorogummite Image

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Thorogummite

Comments: Yellow-tan resinous thorogummite with calcite.
Location: Fort Dauphin, Toliara, Madagascar. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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Thorogummite

Comments: Pale tan to yellowish thorogummite pseudomorphous after thorite in matrix.
Location: Fort Dauphin (T?lanaro) area, Toliara (Tul?ar) Province, Madagascar. Scale: Picture size 5 mm.
© Paul M. Schumacher

Thorogummite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.88568
Help on Cell Dimensions: Cell Dimensions: a = 7.068, c = 6.26, Z = 3; V = 312.73 Den(Calc)= 5.12
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 41/amd
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.537(1), 4.695(0.9), 2.653(0.6),
 

Physical Properties of Thorogummite

Help on Color: Color: Brown, Greenish gray, Buff, White, Black.
Help on Density: Density: 5.4
Help on Diaphaniety: Diaphaniety: Opaque
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Dull
 

Optical Properties of Thorogummite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.379 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.345 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1152,KPDmeas= 0.1093,KC= 0.1758
Help on Optical Data: Optical Data: Isotropic, n=1.54-1.64.
 

Calculated Properties of Thorogummite

Help on Electron Density: Electron Density:

relectron=4.30 gm/cc
note: rThorogummite =5.12 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00376
Boson Index = 0.99624
Help on Photoelectric: Photoelectric:

PEThorogummite =1,808.10 barns/electron
U=PEThorogummite x relectron=7,769.33 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 1,291,328.70 (Gamma Ray American Petroleum Institute Units)

Thorogummite 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) 23.55 ± 5.89 grams of pure Thorogummite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 2355.5 ±588.86 grams of pure Thorogummite .

Estimated Radioactivity from Thorogummite - very 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 / 7.20 cm 32,312,076 8.73E-04 1,291,328.70 424.55
100 gm / 3.34 cm 3,231,208 8.73E-05 129,132.87 42.45
10 gm / 1.55 cm 323,121 8.73E-06 12,913.29 4.25
1 gm / 7.20 mm 32,312 8.73E-07 1,291.33 0.42
0.1 gm / 3.34 mm 3,231 8.73E-08 129.13 0.04
0.01 gm / 1.55 mm 323 8.73E-09 12.91 0.00
0.001 gm / 0.72 mm 32 8.73E-10 1.29 0.00

Weight of pure Thorogummite in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.12 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
 

Thorogummite Classification

Help on  Dana Class: Dana Class: 51.5.2.5 (51)Nesosilicate Insular SiO4 Groups Only
  (51.5)with cations in >[6] coordination
  (51.5.2)Zircon group
 
51.5.2.1 Zircon ZrSiO4 I 41/amd 4/m 2/m 2/m
 
51.5.2.2 Hafnon HfSiO4 I 41/amd 4/m 2/m 2/m
 
51.5.2.3 Thorite ThSiO4 I 41/amd 4/m 2/m 2/m
 
51.5.2.4 Coffinite U(SiO4)1-x(OH)4x I 41/amd 4/m 2/m 2/m
 
51.5.2.5 Thorogummite Th(SiO4)1-x(OH)4x I 41/amd 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: VIII/A.09-50 VIII - Silicates
  VIII/A - Nesosilicates with [SiO4]4-groups, cations of octahedral and cubic orientation [8+6]
  VIII/A.09 - Zircon - Thorogummite series
 
VIII/A.09-05 Reidite! ZrSiO4 I 41/a 4/m
 
VIII/A.09-10 Zircon ZrSiO4 I 41/amd 4/m 2/m 2/m
 
VIII/A.09-20 Hafnon HfSiO4 I 41/amd 4/m 2/m 2/m
 
VIII/A.09-30 Thorite ThSiO4 I 41/amd 4/m 2/m 2/m
 
VIII/A.09-40 Coffinite U(SiO4)1-x(OH)4x I 41/amd 4/m 2/m 2/m
 
VIII/A.09-50 Thorogummite Th(SiO4)1-x(OH)4x I 41/amd 4/m 2/m 2/m
 

Other Thorogummite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Thorogummite :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 - Amethyst Galleries' Mineral Gallery 5 -Athena 6 - Crocoite.com Mineral Locations 7 - EUROmin Project 8 -Google Images 9 -Google Scholar 10 -Handbook of Mineralogy (MinSocAm) 11 -Handbook of Mineralogy (UofA) 12 -MinDAT 13 -MinMax(Deutsch) 14 -MinMax(English) 15 - Mineral and Gemstone Kingdom 16 -Mineralienatlas (Deutsch) 17 - Minerals of Wisconsin 18 -QUT Mineral Atlas 19 - Uranium Minerals 20 -École des Mines de Paris

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

Thorogummite

Th(SiO4)1-x(OH)4x
Dana No: 51.5.2.5 Strunz No: VIII/A.09-50
Locality:

 

Notes:

 

 
   
 
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