General Kahlerite Information
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Chemical Formula: |
Fe++(UO2)2(AsO4)2·10-12(H2O) |
Composition: |
Molecular Weight = 1,071.91 gm |
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Uranium 44.41 % U 50.38 % UO2 |
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Iron 5.21 % Fe 6.70 % FeO |
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Arsenic 13.98 % As 21.44 % As2O5 |
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Hydrogen 2.07 % H 18.49 % H2O |
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Oxygen 34.33 % O |
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______ ______ |
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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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Search for Kahlerite Images |
Images:
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Kahlerite Crystallography
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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), |
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Physical Properties of Kahlerite
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Cleavage: |
[001] Perfect |
Color: |
Yellow green, Lemon. |
Diaphaniety: |
Transparent to Translucent |
Hardness: |
2-2.5 - Gypsum-Finger Nail |
Luster: |
Vitreous (Glassy) |
Streak: |
light yellow |
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Optical Properties of Kahlerite
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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. |
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Calculated Properties of Kahlerite
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Electron Density: |
relectron=2.85 gm/cc note: rKahlerite =3.17 gm/cc. |
Fermion Index |
Fermion Index = 0.00447 Boson Index = 0.99553 |
Photoelectric: |
PEKahlerite =1,132.20 barns/electron U=PEKahlerite x relectron=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
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Kahlerite Classification
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Dana Class: |
40.2a.15.1 (40)Hydrated Phosphates, etc |
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(40.2a)where A++ (B++)2 (XO4) · x(H2O), containing (UO2)++ |
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(40.2a.15)Dana Group |
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40.2a.15.1 Kahlerite Fe(UO2)2(AsO4)2·10-12(H2O) P 41/n 4/m |
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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 |
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VII/E - Uranylphosphates and uranylvanadates with [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6- |
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VII/E.01 - Autunite group |
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VII/E.01-10 Trogerite H2(UO2)2(AsO4)2·8(H2O) P 4/mmm 4/m 2/m 2/m |
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VII/E.01-20 Sabugalite HAl(UO2)4(PO4)4·16(H2O) I 4/mmm 4/m 2/m 2/m |
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VII/E.01-30 Saleeite Mg(UO2)2(PO4)2·10(H2O) I 4/mmm 4/m 2/m 2/m |
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VII/E.01-35 Seelite-1 Mg[(UO2)(AsO3)x(AsO4)1-x]2·7(H2O) C 2/m 2/m |
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VII/E.01-35* Seelite-2 Mg(UO2)(AsO3)x(AsO4)1-x·7(H2O)(x=0.7) C 2/m 2/m |
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VII/E.01-40 Novacekite Mg(UO2)2(AsO4)2·12(H2O) P 41/n 4/m |
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VII/E.01-50 Kahlerite Fe(UO2)2(AsO4)2·10-12(H2O) P 41/n 4/m |
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VII/E.01-60 Fritzscheite Mn(UO2)2[(V,P)O4]2·4(H2O) Pnam 2/m 2/m 2/m |
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VII/E.01-70 Torbernite Cu(UO2)2(PO4)2·8-12(H2O) I 4/mmm 4/m 2/m 2/m |
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VII/E.01-80 Zeunerite Cu(UO2)2(AsO4)2·10-16(H2O) P 4/nnc 4/m 2/m 2/m |
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VII/E.01-90 Autunite Ca(UO2)2(PO4)2·10-12(H2O) I 4/mmm 4/m 2/m 2/m |
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VII/E.01-100 Uranospinite Ca(UO2)2(AsO4)2·10(H2O) I 4/mmm 4/m 2/m 2/m |
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VII/E.01-110 Uranocircite Ba(UO2)2(PO4)2·12(H2O) P 4/nnc 4/m 2/m 2/m |
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VII/E.01-120 Heinrichite Ba(UO2)2(AsO4)2·10-12(H2O) IA/mmm 4/m 2/m 2/m |
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VII/E.01-130 Sodium-autunite Na2(UO2)2(PO4)2·8(H2O) P 4/nmm 4/m 2/m 2/m |
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Other Kahlerite Information
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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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Print or Cut-and-Paste your Kahlerite Specimen Label here :
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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:
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