Kahlerite Mineral Data (original) (raw)
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 % As2O5
Hydrogen 2.07 % H 18.49 % H2O
Oxygen 34.33 % O
______ ______
100.00 % 97.01 % = TOTAL OXIDE
Empirical Formula:
Fe2+(UO2)2(AsO4)2•11(H2O)
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 
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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 - DipyramidalH-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/electron
U=PEKahlerite x relectron=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
| SpecimenSizeWeight/Volume(Sphere) * | CalculatedActivityBecquerels(Bq) | CalculatedActivityCuries (Ci) | EstimatedActivityGR(api) | EstimatedExposure(mRem**)/hrIf Held in HandFor 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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Print or Cut-and-Paste your Kahlerite Specimen Label here :
Kahlerite
Fe++(UO2)2(AsO4)2•10-12(H2O)
Dana No: 40.02a.15.01 Strunz No: 08.EB.05
Locality:
Notes: