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Derriksite Mineral Data

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General Derriksite Information

Help on Chemical  Formula: Chemical Formula: Cu4(UO2)(SeO3)2(OH)6
Help on Composition: Composition: Molecular Weight = 880.17 gm
   Uranium   27.04 %  U    30.68 % UO2
   Copper    28.88 %  Cu   36.15 % CuO
   Hydrogen   0.69 %  H     6.14 % H2O
   Selenium  17.94 %  Se   25.21 % SeO2
   Oxygen    25.45 %  O
            ______        ______ 
            100.00 %       98.18 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu4(UO2)(SeO3)2(OH)6
Help on Environment: Environment: Oxidized portions of a selenium-bearing Cu�Co deposit.
Help on IMA Status: IMA Status: Approved IMA 1971
Help on Locality: Locality: Musonoi Cu-Co mine, near Kolwezi, Katanga Province, Congo (Shaba Province, Zaire). Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Jean Marie Francois Joseph Derriks (1912-1993), Belgian geologist who studied the Shinkolobwe uranium deposit.
Help on Name Pronunciation: Name Pronunciation: Derriksite + Pronunciation Say DERRIKSITE
Help on Synonym: Synonym: ICSD 38076
  PDF 25-319
 

Derriksite Image

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  Derriksite

Comments: Light blue crystalline aggregates of derriksite.
Location: Musonoi mine, Kolwezi, Shaba, Democratic Republic of the Congo. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Derriksite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.2918:1:0.3125
Help on Cell Dimensions: Cell Dimensions: a = 5.57, b = 19.088, c = 5.965, Z = 2; V = 634.20 Den(Calc)= 4.61
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Pn21m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.78(1), 3.748(0.8), 4.072(0.8),
 

Physical Properties of Derriksite

Help on Cleavage: Cleavage: {???} Perfect, {010} Good
Help on Color: Color: Bottle green, Green.
Help on Density: Density: 4.72
Help on Diaphaneity: Diaphaneity: Translucent
 

Optical Properties of Derriksite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.093 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.119 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1815,KPDmeas= 0.1773,KC= 0.1622
Ncalc = 1.75 - 1.77
Help on Optical Data: Optical Data: Biaxial (-), a=1.77, b=1.85, g=1.89, bire=0.1200
 

Calculated Properties of Derriksite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.23 gm/cc
note: Specific Gravity of Derriksite =4.72 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEDerriksite = 713.01 barns/electron
U=PEDerriksite x relectron=3,012.99 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 2,063,737.27 (Gamma Ray American Petroleum Institute Units)
Concentration of Derriksite per GRapi unit = 484.56 (PPB)

Derriksite 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) 14.74 ± 3.68 grams of pure Derriksite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1473.9 ±368.47 grams of pure Derriksite .

Estimated Radioactivity from Derriksite - 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 / 7.40 cm 48,407,773 1.31E-03 2,063,737.27 678.49
100 gm / 3.43 cm 4,840,777 1.31E-04 206,373.73 67.85
10 gm / 1.59 cm 484,078 1.31E-05 20,637.37 6.78
1 gm / 7.40 mm 48,408 1.31E-06 2,063.74 0.68
0.1 gm / 3.43 mm 4,841 1.31E-07 206.37 0.07
0.01 gm / 1.59 mm 484 1.31E-08 20.64 0.01
0.001 gm / 0.74 mm 48 1.31E-09 2.06 0.00

Weight of pure Derriksite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.72 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
 

Derriksite Classification

Help on  Dana Class: Dana Class: 34.07.05.01 (34)Selenites - Tellurites - Sulfites
  (34.07)Dana Type
  (34.07.05)Dana Group
 
34.07.05.01 Derriksite Cu4(UO2)(SeO3)2(OH)6 Pn21m mm2
Help on  Strunz Class: Strunz Class: 04.JG.30 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JG -Selenites with additional anions, without H2O
 
04.JG.30 Derriksite Cu4(UO2)(SeO3)2(OH)6 Pn21m mm2
 

Other Derriksite Information

Help on References: References: NAME( AntBidBlaNic5) 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 Derriksite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - Uranium Minerals
14 - WWW-MINCRYST

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Derriksite

Cu4(UO2)(SeO3)2(OH)6
Dana No: 34.07.05.01 Strunz No: 04.JG.30
Locality:

 

Notes:

 

 
   
 


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