Kahlerite Mineral Data
General Kahlerite Information
Chemical Formula:
Fe++(UO2)2(AsO4)2•10-12(H2O)
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 % As2 O5
Hydrogen 2.07 % H 18.49 % H2 O
Oxygen 34.33 % O
______ ______
100.00 % 97.01 % = TOTAL OXIDE
Empirical Formula:
Fe2+ (UO2 )2 (AsO4 )2 •11(H2 O)
Environment:
Secondary mineral in the oxidized zone of a uraninite-bearing iron deposit.
IMA Status:
Valid Species (Pre-IMA) 1953
Locality:
Huttenberg, Carinthia, Austria. Link to MinDat.org Location Data.
Name Origin:
Named for Franz Kahler, geologist, Carinthian Landesmuseum, Klagenfurt, Austria.
Name Pronunciation:
Kahlerite + Pronunciation
Kahlerite Crystallography
Axial Ratios:
a:c = 1:1.53636
Cell Dimensions:
a = 14.3, c = 21.97, Z = 8; V = 4,492.65 Den(Calc)= 3.17
Crystal System:
Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: P 41 /n
X Ray Diffraction:
By Intensity(I/Io ): 3.53(1), 11.1(0.8), 5.55(0.5),
Physical Properties of Kahlerite
Cleavage:
{001} Perfect
Color:
Yellow green, Lemon.
Diaphaneity:
Transparent to Translucent
Hardness:
2-2.5 - Gypsum-Finger Nail
Luster:
Vitreous (Glassy)
Streak:
light yellow
Optical Properties of Kahlerite
Gladstone-Dale:
CI calc = -0.244 (Poor) - where the CI = (1-KPDcalc /KC ) KPDcalc = 0.1997,KC = 0.1606 Ncalc = 1.51
Optical Data:
Uniaxial (-), e=1.632, w=1.634, bire=0.0020.
Calculated Properties of Kahlerite
Electron Density:
Bulk Density (Electron Density)=2.85 gm/cc note: Specific Gravity of Kahlerite =3.17 gm/cc.
Fermion Index:
Fermion Index = 0.0044700928 Boson Index = 0.9955299072
Photoelectric:
PEKahlerite =1,132.20 barns/electronU=PEKahlerite x r electron =3,227.77 barns/cc.
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
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 / 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
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
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
References:
NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
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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Kahlerite
Fe++(UO2)2(AsO4)2•10-12(H2O)
Dana No: 40.02a.15.01 Strunz No: 08.EB.05
Locality:
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