Mineralogy Database

Kahlerite Mineral Data

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General Kahlerite Information

Help on Chemical  Formula: Chemical Formula: Fe++(UO2)2(AsO4)2•10-12(H2O)
Help on Composition: Composition: Molecular Weight = 1,071.91 gm
   Uranium   44.41 %  U    50.38 % UO2
   Iron       5.21 %  Fe    6.70 % FeO
   Arsenic   13.98 %  As   21.44 % As2O5
   Hydrogen   2.07 %  H    18.49 % H2O
   Oxygen    34.33 %  O
            ______        ______ 
            100.00 %       97.01 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+(UO2)2(AsO4)2•11(H2O)
Help on Environment: Environment: Secondary mineral in the oxidized zone of a uraninite-bearing iron deposit.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1953
Help on Locality: Locality: Huttenberg, Carinthia, Austria. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Franz Kahler, geologist, Carinthian Landesmuseum, Klagenfurt, Austria.
Help on Name Pronunciation: Name Pronunciation: Kahlerite + Pronunciation Say KAHLERITE

Kahlerite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.53636
Help on Cell Dimensions: Cell Dimensions: a = 14.3, c = 21.97, Z = 8; V = 4,492.65 Den(Calc)= 3.17
Help on Crystal System: Crystal System: Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: P 41/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.53(1), 11.1(0.8), 5.55(0.5),

Physical Properties of Kahlerite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Yellow green, Lemon.
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light yellow

Optical Properties of Kahlerite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.244 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1997,KC= 0.1606
Ncalc = 1.51
Help on Optical Data: Optical Data: Uniaxial (-), e=1.632, w=1.634, bire=0.0020.

Calculated Properties of Kahlerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.85 gm/cc
note: Specific Gravity of Kahlerite =3.17 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0044700928
Boson Index = 0.9955299072
Help on Photoelectric: Photoelectric: PEKahlerite =1,132.20 barns/electron
U=PEKahlerite x relectron=3,227.77 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,404,510.82 (Gamma Ray American Petroleum Institute Units)
Concentration of Kahlerite per GRapi unit = 293.73 (PPB)

Kahlerite 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) 8.93 ± 2.23 grams of pure Kahlerite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 893.42 ±223.36 grams of pure Kahlerite .

Estimated Radioactivity from Kahlerite - very strong
Curies (Ci)
If Held in Hand
For One Hour
1000 gm / 8.45 cm 79,497,752 2.15E-03 3,404,510.82 1,119.29
100 gm / 3.92 cm 7,949,775 2.15E-04 340,451.08 111.93
10 gm / 1.82 cm 794,978 2.15E-05 34,045.11 11.19
1 gm / 8.45 mm 79,498 2.15E-06 3,404.51 1.12
0.1 gm / 3.92 mm 7,950 2.15E-07 340.45 0.11
0.01 gm / 1.82 mm 795 2.15E-08 34.05 0.01
0.001 gm / 0.84 mm 79 2.15E-09 3.40 0.00

Weight of pure Kahlerite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.17 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

Kahlerite Classification

Help on  Dana Class: Dana Class: 40.02a.15.01 (40)Hydrated Phosphates, etc
  (40.02a)where A++ (B++)2 (XO4) � x(H2O), containing (UO2)++
  (40.02a.15)Dana Group
40.02a.15.01 Kahlerite Fe(UO2)2(AsO4)2•10-12(H2O) P 41/n 4/m
40.02a.15.02 Metakahlerite Fe(UO2)2(AsO4)2•8(H2O) P 4/mmm 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.EB.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.E - Uranyl Phosphates and Arsenates
  08.EB -UO2:RO4 = 1:1
08.EB.05 Autunite Ca(UO2)2(PO4)2•10-12(H2O) I 4/mmm 4/m 2/m 2/m
08.EB.05 Heinrichite Ba(UO2)2(AsO4)2•10-12(H2O) P 2/c 2/m
08.EB.05 Kahlerite Fe(UO2)2(AsO4)2•10-12(H2O) P 41/n 4/m
08.EB.05 Uranocircite Ba(UO2)2(PO4)2•12(H2O) P 4/nnc 4/m 2/m 2/m
08.EB.05 Novacekite Mg(UO2)2(AsO4)2•12(H2O) P 41/n 4/m
08.EB.05 Saleeite Mg(UO2)2(PO4)2•10(H2O) I 4/mmm 4/m 2/m 2/m
08.EB.05 Xiangjiangite (Fe,Al)(UO2)4(PO4)2(SO4)2(OH)•22(H2O) C 2/c or Cc Mono
08.EB.05 Torbernite Cu(UO2)2(PO4)2•8-12(H2O) I 4/mmm 4/m 2/m 2/m
08.EB.05 Uranospinite Ca(UO2)2(AsO4)2•10(H2O) P nma 2/m 2/m 2/m
08.EB.05 Zeunerite Cu(UO2)2(AsO4)2•10-16(H2O) P 4/nnc 4/m 2/m 2/m
08.EB.05 Metarauchite! Ni(UO2)2(AsO4)2•8H2O P1 1

Other Kahlerite 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 Kahlerite :
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
15 - Uranium Minerals

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Dana No: 40.02a.15.01 Strunz No: 08.EB.05





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