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 % 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

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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:

PE_Kahlerite=1,132.20 barns/electron
U=PE_Kahlerite 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) ï¿½ 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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