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Thorogummite Mineral Data

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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 Name Pronunciation: Name Pronunciation: Thorogummite + Pronunciation Say THOROGUMMITE
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 (Tôlanaro) area, Toliara (Tuléar) 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 Dipyramidal H-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 Diaphaneity: Diaphaneity: 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
Ncalc = 1.9 - 1.95
Help on Optical Data: Optical Data: Isotropic, n=1.54-1.64.
 

Calculated Properties of Thorogummite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.30 gm/cc
note: Specific Gravity of Thorogummite =5.12 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0037655746
Boson Index = 0.9962344254
Help on Photoelectric: Photoelectric: PEThorogummite =1,808.10 barns/electron
U=PEThorogummite x relectron=7,769.33 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 1,291,329.08 (Gamma Ray American Petroleum Institute Units)
Concentration of Thorogummite per GRapi unit = 774.40 (PPB)

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 32,312,078 8.73E-04 1,291,329.08 424.55
100 gm / 3.34 cm 3,231,208 8.73E-05 129,132.91 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: 51.05.02.05 (51)Nesosilicate Insular SiO4 Groups Only
  (51.05)with cations in >[6] coordination
  (51.05.02)Zircon group
 
51.05.02.01 Zircon ZrSiO4 I 41/amd 4/m 2/m 2/m
 
51.05.02.02 Hafnon HfSiO4 I 41/amd 4/m 2/m 2/m
 
51.05.02.03 Thorite ThSiO4 I 41/amd 4/m 2/m 2/m
 
51.05.02.04 Coffinite U(SiO4)1-x(OH)4x I 41/amd 4/m 2/m 2/m
 
51.05.02.05 Thorogummite Th(SiO4)1-x(OH)4x I 41/amd 4/m 2/m 2/m
 
51.05.02.06 IMA2008-035! CeSiO4 I 41/amd 4mm
Help on  Strunz Class: Strunz Class: 09.AD.30 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AD -Nesosilicates without additional anions;
 
09.AD.30 Coffinite U(SiO4)1-x(OH)4x I 41/amd 4/m 2/m 2/m
 
09.AD.30 Hafnon HfSiO4 I 41/amd 4/m 2/m 2/m
 
09.AD.30 Thorite ThSiO4 I 41/amd 4/m 2/m 2/m
 
09.AD.30 Thorogummite Th(SiO4)1-x(OH)4x I 41/amd 4/m 2/m 2/m
 
09.AD.30 Zircon ZrSiO4 I 41/amd 4/m 2/m 2/m
 
09.AD.30 IMA2008-035! CeSiO4 I 41/amd 4mm
 

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 - EUROmin Project
7 - Ecole des Mines de Paris
8 - GeoScienceWorld
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
13 - MinDAT
14 - Mineral and Gemstone Kingdom
15 - Mineralienatlas (Deutsch)
16 - Online Mineral Museum
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - Uranium Minerals

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

Thorogummite

Th(SiO4)1-x(OH)4x
Dana No: 51.05.02.05 Strunz No: 09.AD.30
Locality:

 

Notes:

 

 
   
 


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