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Marthozite Mineral Data

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General Marthozite Information

Help on Chemical  Formula: Chemical Formula: Cu[(UO2)3(SeO3)2O2]•8(H2O)
Help on Composition: Composition: Molecular Weight = 1,303.67 gm
   Uranium   54.78 %  U    62.14 % UO2
   Copper     4.87 %  Cu    6.10 % CuO
   Hydrogen   1.24 %  H    11.06 % H2O
   Selenium  12.11 %  Se   17.02 % SeO2
   Oxygen    27.00 %  O
            ______        ______ 
            100.00 %       96.32 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu(UO2)3(SeO3)2(O)2•8(H2O)
Help on Environment: Environment: In cavities in selenian digenite. Dehydrates in air to (H2O)6.
Help on IMA Status: IMA Status: Approved IMA 1969
Help on Locality: Locality: Musonoi mine, Kolwezi, Shaba, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Aime Marthoz (1864-1962), French mineralogist and inspector General, Bureau de Recherches Geolgiques et Miniere.
Help on Name Pronunciation: Name Pronunciation: Marthozite + Pronunciation Say MARTHOZITE
 

Marthozite Image

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  Marthozite

Comments: Yellowish green coating of marthozite on matrix.
Location: Musonoi Mine, Katanga, Democratic Republic of the Congo. Scale: Not Given.
© John Veevaert

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  Marthozite

Comments: Olive green crystal of marthozite showing multiple face development on main crystal. Schumacher Collection.
Location: Musonoi Mine, Kolwezi, Western area, Shaba Cu belt, Shaba (Katanga), Congo (Zaïre). Scale: Picture size 5 mm.
© Paul M. Schumacher

Marthozite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4247:1:1.0467
Help on Cell Dimensions: Cell Dimensions: a = 6.9879, b = 16.4537, c = 17.2229, Z = 4; V = 1,980.23 Den(Calc)= 4.37
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Pbn21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.09(1), 8.23(1), 3.22(0.8),
Help on Forms: Forms:

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Drag2 - Resize

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Help on Above

Forms: ( 1 0 0) ( 1 0 3) ( 1 0 5) ( 1 0 1) ( 1 4 1.2) ( 0 2 1) ( 1 4 0) ( 0 0 1) ( 0 1 0)

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Physical Properties of Marthozite

Help on Cleavage: Cleavage: {100} Perfect, {010} Indistinct
Help on Color: Color: Greenish brown, Yellow green.
Help on Density: Density: 4.44
Help on Habit: Habit: Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Help on Hardness: Hardness: 6 - Orthoclase
 

Optical Properties of Marthozite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.23 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.25 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1791,KPDmeas= 0.1762,KC= 0.1433
Ncalc = 1.63 - 1.64
Help on Optical Data: Optical Data: Biaxial (-), b=1.78-1.785, g=1.78-1.785, , 2V(Meas)=37-42.
Help on Pleochroism (x): Pleochroism (x): yellowish brown.
Help on Pleochroism (y): Pleochroism (y): greenish yellow.
Help on Pleochroism (z): Pleochroism (z): greenish yellow.
 

Calculated Properties of Marthozite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.85 gm/cc
note: Specific Gravity of Marthozite =4.44 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEMarthozite =1,445.94 barns/electron
U=PEMarthozite x relectron=5,564.74 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,046,970.93 (Gamma Ray American Petroleum Institute Units)
Concentration of Marthozite per GRapi unit = 247.10 (PPB)

Marthozite 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) 7.52 ± 1.88 grams of pure Marthozite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 751.59 ±187.90 grams of pure Marthozite .

Estimated Radioactivity from Marthozite - 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 / 7.55 cm 98,047,710 2.65E-03 4,046,970.93 1,330.51
100 gm / 3.50 cm 9,804,771 2.65E-04 404,697.09 133.05
10 gm / 1.63 cm 980,477 2.65E-05 40,469.71 13.31
1 gm / 7.55 mm 98,048 2.65E-06 4,046.97 1.33
0.1 gm / 3.50 mm 9,805 2.65E-07 404.70 0.13
0.01 gm / 1.63 mm 980 2.65E-08 40.47 0.01
0.001 gm / 0.75 mm 98 2.65E-09 4.05 0.00

Weight of pure Marthozite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.44 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
 

Marthozite Classification

Help on  Dana Class: Dana Class: 34.07.04.01 (34)Selenites - Tellurites - Sulfites
  (34.07)Dana Type
  (34.07.04)Dana Group
 
34.07.04.01 Marthozite Cu[(UO2)3(SeO3)2O2]•8(H2O) Pbn21 mm2
Help on  Strunz Class: Strunz Class: 04.JJ.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JJ -Selenites with additional anions, with H2O
 
04.JJ.05 Marthozite Cu[(UO2)3(SeO3)2O2]•8(H2O) Pbn21 mm2
 

Other Marthozite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(AmMin, Vol 87, p 358) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Marthozite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - Uranium Minerals

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

Marthozite

Cu[(UO2)3(SeO3)2O2]•8(H2O)
Dana No: 34.07.04.01 Strunz No: 04.JJ.05
Locality:

 

Notes:

 

 
   
 


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