Kahlerite Mineral Data

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)

IMA Status:

Valid Species (Pre-IMA) 1953

Locality:

Link to MinDat.org Location Data.

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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

$Help on X Ray Diffraction:$ 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.

Diaphaniety:

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

Optical Data:

Uniaxial (-), e=1.632, w=1.634, bire=0.0020.

Calculated Properties of Kahlerite

Electron Density:

r_electron=2.85 gm/cc
note: r_Kahlerite=3.17 gm/cc.

Fermion Index

Fermion Index = 0.00447
Boson Index = 0.99553

Photoelectric:

PE_Kahlerite=1,132.20 barns/electron
U=PE_Kahlerite x r_electron=3,227.77 barns/cc.

Radioactivity:

GRapi = 3,404,509.26 (Gamma Ray American Petroleum Institute Units)

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	79,497,749	2.15E-03	3,404,509.26	1,119.29
100 gm / 3.92 cm	7,949,775	2.15E-04	340,450.93	111.93
10 gm / 1.82 cm	794,977	2.15E-05	34,045.09	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:

40.2a.15.1 (40)Hydrated Phosphates, etc

(40.2a)where A++ (B++)2 (XO4) · x(H2O), containing (UO2)++

(40.2a.15)Dana Group

40.2a.15.1 Kahlerite Fe(UO2)2(AsO4)2·10-12(H2O) P 4₁/n 4/m

40.2a.15.2 Metakahlerite Fe(UO2)2(AsO4)2·8(H2O) P 4/mmm 4/m 2/m 2/m

Strunz Class:

VII/E.01-50 VII - Phosphates, Arsenates and Vanadates

VII/E - Uranylphosphates and uranylvanadates with [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-

VII/E.01 - Autunite group

VII/E.01-10 Trogerite H2(UO2)2(AsO4)2·8(H2O) P 4/mmm 4/m 2/m 2/m

VII/E.01-20 Sabugalite HAl(UO2)4(PO4)4·16(H2O) I 4/mmm 4/m 2/m 2/m

VII/E.01-30 Saleeite Mg(UO2)2(PO4)2·10(H2O) I 4/mmm 4/m 2/m 2/m

VII/E.01-35 Seelite-1 Mg[(UO2)(AsO3)x(AsO4)1-x]2·7(H2O) C 2/m 2/m

VII/E.01-35* Seelite-2 Mg(UO2)(AsO3)x(AsO4)1-x·7(H2O)(x=0.7) C 2/m 2/m

VII/E.01-40 Novacekite Mg(UO2)2(AsO4)2·12(H2O) P 4₁/n 4/m

VII/E.01-50 Kahlerite Fe(UO2)2(AsO4)2·10-12(H2O) P 4₁/n 4/m

VII/E.01-60 Fritzscheite Mn(UO2)2[(V,P)O4]2·4(H2O) Pnam 2/m 2/m 2/m

VII/E.01-70 Torbernite Cu(UO2)2(PO4)2·8-12(H2O) I 4/mmm 4/m 2/m 2/m

VII/E.01-80 Zeunerite Cu(UO2)2(AsO4)2·10-16(H2O) P 4/nnc 4/m 2/m 2/m

VII/E.01-90 Autunite Ca(UO2)2(PO4)2·10-12(H2O) I 4/mmm 4/m 2/m 2/m

VII/E.01-100 Uranospinite Ca(UO2)2(AsO4)2·10(H2O) I 4/mmm 4/m 2/m 2/m

VII/E.01-110 Uranocircite Ba(UO2)2(PO4)2·12(H2O) P 4/nnc 4/m 2/m 2/m

VII/E.01-120 Heinrichite Ba(UO2)2(AsO4)2·10-12(H2O) IA/mmm 4/m 2/m 2/m

VII/E.01-130 Sodium-autunite Na2(UO2)2(PO4)2·8(H2O) P 4/nmm 4/m 2/m 2/m

Other Kahlerite Information

References:

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - Uranium Minerals 13 -École des Mines de Paris

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Kahlerite

Fe++(UO2)2(AsO4)2·10-12(H2O)
Dana No: 40.2a.15.1 Strunz No: VII/E.01-50
Locality:

Notes: