Mineralogy Database

Schmitterite Mineral Data

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General Schmitterite Information

Help on Chemical  Formula: Chemical Formula: (UO2)TeO3
Help on Composition: Composition: Molecular Weight = 445.63 gm
   Uranium    53.41 %  U    60.60 % UO2
   Tellurium  28.63 %  Te   35.81 % TeO2
   Oxygen     17.95 %  O
             ______        ______ 
             100.00 %       96.41 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (UO2)(TeO3)
Help on Environment: Environment: Secondary mineral in the oxidized portions of a telluride-bearing deposit.
Help on IMA Status: IMA Status: Approved IMA 1971
Help on Locality: Locality: Moctezuma mine ("La Bamolla"), Moctezuma, Sonora, Mexico. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Eduardo Schmitter Villada (1904-1982), professor of mineralogy, Universidad Nacional Autonoma de Mexico.
Help on Name Pronunciation: Name Pronunciation: Schmitterite + Pronunciation Say SCHMITTERITE
Help on Synonym: Synonym: ICSD 2553
  PDF 25-1001
 

Schmitterite Image

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  Schmitterite   Emmonsite

Comments: Yellow schmitterite with green emmonsite.
Location: Moctezuma, Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Schmitterite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.779:1:0.532
Help on Cell Dimensions: Cell Dimensions: a = 7.86, b = 10.089, c = 5.368, Z = 4; V = 425.68 Den(Calc)= 6.95
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pmab
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.682(1), 3.099(0.9), 5.35(0.9),
 

Physical Properties of Schmitterite

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Colorless, Light yellow.
Help on Density: Density: 6.878
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 1 - Talc
Help on Luster: Luster: Pearly
Help on Streak: Streak: white
 

Optical Properties of Schmitterite

Help on Optical Data: Optical Data: NCalc= 1.92 - from Gladstone-Dale relationship (KC = 0.1326) where Ncalc=Dcalc*KC+1
NCalc= 1.91 - from Gladstone-Dale relationship (KC = 0.1326) where Ncalc=Dmeas*KC+1
 

Calculated Properties of Schmitterite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.74 gm/cc
note: Specific Gravity of Schmitterite =6.95 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PESchmitterite =1,573.84 barns/electron
U=PESchmitterite x relectron=9,032.80 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,759,848.95 (Gamma Ray American Petroleum Institute Units)
Concentration of Schmitterite per GRapi unit = 265.97 (PPB)

Schmitterite 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) 8.09 ± 2.02 grams of pure Schmitterite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 808.99 ±202.25 grams of pure Schmitterite .

Estimated Radioactivity from Schmitterite - 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 / 6.50 cm 95,611,977 2.58E-03 3,759,848.95 1,236.11
100 gm / 3.02 cm 9,561,198 2.58E-04 375,984.90 123.61
10 gm / 1.40 cm 956,120 2.58E-05 37,598.49 12.36
1 gm / 6.50 mm 95,612 2.58E-06 3,759.85 1.24
0.1 gm / 3.02 mm 9,561 2.58E-07 375.98 0.12
0.01 gm / 1.40 mm 956 2.58E-08 37.60 0.01
0.001 gm / 0.65 mm 96 2.58E-09 3.76 0.00

Weight of pure Schmitterite in grams (gm) and Calculated Diameter of a Sphere with a Density of 6.95 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
 

Schmitterite Classification

Help on  Dana Class: Dana Class: 34.01.06.01 (34)Selenites - Tellurites - Sulfites
  (34.01)as A++ XO3
  (34.01.06)Dana Group
 
34.01.06.01 Schmitterite (UO2)TeO3 Pmab 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.JK.70 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JK -Tellurites without additional anions, without H2O
 
04.JK.70 Schmitterite (UO2)TeO3 Pmab 2/m 2/m 2/m
 

Other Schmitterite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Schmitterite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Uranium Minerals
17 - WWW-MINCRYST

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

Schmitterite

(UO2)TeO3
Dana No: 34.01.06.01 Strunz No: 04.JK.70
Locality:

 

Notes:

 

 
   
 


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