Kahlerite Mineral Data

Advertisment

Updated weekly, for the collector, educator, and researcher since 1996. Extensive Inventory of very Rare Minerals. Visa and Mastercard are Welcome

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

Search for Kahlerite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

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

$Help on X Ray Diffraction:$ 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 Becquerels (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

Search for Kahlerite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Kahlerite :

Dakota Matrix Minerals Google Search for Kahlerite
John Betts Fine Minerals Search for Kahlerite
McDougall Minerals Google Search for Kahlerite
Rock and Mineral Shows Google Search for Kahlerite
Weinrich Minerals, Inc. Google Search for Kahlerite

Ask about Kahlerite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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: