Mineralogy Database

Metakirchheimerite Mineral Data

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General Metakirchheimerite Information

Help on Chemical  Formula: Chemical Formula: Co(UO2)2(AsO4)2•8(H2O)
Help on Composition: Composition: Molecular Weight = 1,020.95 gm
   Uranium   46.63 %  U    52.90 % UO2
   Cobalt     5.77 %  Co    8.12 % Co2O3
   Arsenic   14.68 %  As   22.51 % As2O5
   Hydrogen   1.58 %  H    14.12 % H2O
   Oxygen    31.34 %  O
            ______        ______ 
            100.00 %       97.65 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Co(UO2)2(AsO4)2•8(H2O)
Help on Environment: Environment: Secondary mineral formed in the oxidized zone of a U-As deposit.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1958
Help on Locality: Locality: Dump of the Sophia mine, near Wittichen, Black Forest, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for meta which indicates membership of this species in the meta-autunite group and for Franz Waldemar Kirchheimer (1911-), former Director of the Geological Survey of Baden-Wu rttemberg, Germany.
Help on Name Pronunciation: Name Pronunciation: Metakirchheimerite + Pronunciation Say METAKIRCHHEIMERITE
 

Metakirchheimerite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.19498
Help on Cell Dimensions: Cell Dimensions: a = 7.18, c = 8.58, Z = 1; V = 442.32 Den(Calc)= 3.83
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 4/mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.56(1), 8.55(1), 5.07(0.6),
 

Physical Properties of Metakirchheimerite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Light pink.
Help on Density: Density: 3.2 - 3.25, Average = 3.22
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Pearly
Help on Streak: Streak: white
 

Optical Properties of Metakirchheimerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.191 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.003 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1646,KPDmeas= 0.1955,KC= 0.1641
Ncalc = 1.53 - 1.63
Help on Optical Data: Optical Data: Uniaxial (-), e=1.617, w=1.644, bire=0.0270.
 

Calculated Properties of Metakirchheimerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.40 gm/cc
note: Specific Gravity of Metakirchheimerite =3.83 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0035100956
Boson Index = 0.9964899044
Help on Photoelectric: Photoelectric: PEMetakirchheimerite =1,205.00 barns/electron
U=PEMetakirchheimerite x relectron=4,095.52 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,527,063.82 (Gamma Ray American Petroleum Institute Units)
Concentration of Metakirchheimerite per GRapi unit = 283.52 (PPB)

Metakirchheimerite 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) 8.62 ± 2.16 grams of pure Metakirchheimerite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 862.38 ±215.59 grams of pure Metakirchheimerite .

Estimated Radioactivity from Metakirchheimerite - 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 / 7.93 cm 83,465,801 2.26E-03 3,527,063.82 1,159.58
100 gm / 3.68 cm 8,346,580 2.26E-04 352,706.38 115.96
10 gm / 1.71 cm 834,658 2.26E-05 35,270.64 11.60
1 gm / 7.93 mm 83,466 2.26E-06 3,527.06 1.16
0.1 gm / 3.68 mm 8,347 2.26E-07 352.71 0.12
0.01 gm / 1.71 mm 835 2.26E-08 35.27 0.01
0.001 gm / 0.79 mm 83 2.26E-09 3.53 0.00

Weight of pure Metakirchheimerite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.83 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
 

Metakirchheimerite Classification

Help on  Dana Class: Dana Class: 40.02a.17.01 (40)Hydrated Phosphates, etc
  (40.02a)where A++ (B++)2 (XO4) � x(H2O), containing (UO2)++
  (40.02a.17)Dana Group
 
40.02a.17.01 Metakirchheimerite Co(UO2)2(AsO4)2•8(H2O) P 4/mmm 4/m 2/m 2/m
 
40.02a.17.02 Metarauchite! Ni(UO2)2(AsO4)2•8H2O P1 1
Help on  Strunz Class: Strunz Class: 08.EB.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.E - Uranyl Phosphates and Arsenates
  08.EB -UO2:RO4 = 1:1
 
08.EB.10 Bassetite Fe(UO2)2(PO4)2•8(H2O) P 21/m 2/m
 
08.EB.10 Lehnerite Mn[UO2/PO4]2•8(H2O) P 21/n 2/m
 
08.EB.10 Metazeunerite Cu(UO2)2(AsO4)2•8(H2O) P 4/n 4/m
 
08.EB.10 Meta-autunite Ca(UO2)2(PO4)2•2-6(H2O) P 4/nmm 4/m 2/m 2/m
 
08.EB.10 Metauranocircite Ba(UO2)2(PO4)2•6-8(H2O) P 21 2
 
08.EB.10 Metauranospinite Ca(UO2)2(AsO4)2•8(H2O) P 4/nmm 4/m 2/m 2/m
 
08.EB.10 Metaheinrichite Ba(UO2)2(AsO4)2•8(H2O) P 21 2
 
08.EB.10 Metakahlerite Fe(UO2)2(AsO4)2•8(H2O) P 4/mmm 4/m 2/m 2/m
 
08.EB.10 Metakirchheimerite Co(UO2)2(AsO4)2•8(H2O) P 4/mmm 4/m 2/m 2/m
 
08.EB.10 Metalodevite Zn(UO2)2(AsO4)2•10(H2O) P 41/m 4/m
 
08.EB.10 Metanovacekite Mg(UO2)2(AsO4)2•4-8(H2O) P 4/n 4/m
 
08.EB.10 Metatorbernite Cu(UO2)2(PO4)2•8(H2O) P 4/n 4/m
 
08.EB.10 Przhevalskite Pb(UO2)2(PO4)2•4(H2O) Unk Tetra
 

Other Metakirchheimerite Information

Help on References: References: NAME( AntBidBlaNic4) 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 Metakirchheimerite :
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 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Metakirchheimerite

Co(UO2)2(AsO4)2•8(H2O)
Dana No: 40.02a.17.01 Strunz No: 08.EB.10
Locality:

 

Notes:

 

 
   
 


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