Lehnerite Mineral Data
General Lehnerite Information
Chemical Formula:
Mn[UO2/PO4]2•8(H2O)
Composition:
Molecular Weight = 929.06 gm
Uranium 51.24 % U 58.13 % UO2
Manganese 5.91 % Mn 8.50 % Mn2 O3
Phosphorus 6.67 % P 15.28 % P2 O5
Hydrogen 1.74 % H 15.51 % H2 O
Oxygen 34.44 % O
______ ______
100.00 % 97.42 % = TOTAL OXIDE
Empirical Formula:
Mn3+ (UO2 )2 (PO4 )2 •8(H2 O)
Environment:
Secondary mineral in the oxidized zone of a complex granite pegmatite.
IMA Status:
Approved IMA 1988
Locality:
Hagendorf, Bavaria, Germany. Link to MinDat.org Location Data.
Name Origin:
Named for Ferdinand Lehner (1868-1943), Pleystein, Germany, an early collector of Hagendorf minerals.
Name Pronunciation:
Lehnerite + Pronunciation
Lehnerite Crystallography
Axial Ratios:
a:b:c =0.4102:1:0.405
Cell Dimensions:
a = 7.04, b = 17.16, c = 6.95, Z = 2; beta = 90.18° V = 839.60 Den(Calc)= 3.67
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21 /n
X Ray Diffraction:
By Intensity(I/Io ): 8.56(1), 3.5(0.8), 2.23(0.7),
Physical Properties of Lehnerite
Cleavage:
{???} Perfect
Color:
Bronze, Honey yellow.
Density:
3.5 - 3.6, Average = 3.55
Diaphaneity:
Transparent
Hardness:
2-3 - Gypsum-Calcite
Luster:
Vitreous - Pearly
Streak:
white
Optical Properties of Lehnerite
Gladstone-Dale:
CI meas = -0.035 (Excellent) - where the CI = (1-KPDmeas /KC ) CI calc = -0.002 (Superior) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.1647,KPDmeas = 0.1702,KC = 0.1644 Ncalc = 1.58 - 1.6
Optical Data:
Biaxial (-), a=1.599, b=1.607, g=1.607, bire=0.0080, 2V(Calc)=0, 2V(Meas)=45.
Calculated Properties of Lehnerite
Electron Density:
Bulk Density (Electron Density)=3.28 gm/cc note: Specific Gravity of Lehnerite =3.67 gm/cc.
Fermion Index:
Fermion Index = 0.0038572703 Boson Index = 0.9961427297
Photoelectric:
PELehnerite =1,303.31 barns/electronU=PELehnerite x r electron =4,273.16 barns/cc.
Radioactivity:
GRapi = 3,901,983.91 (Gamma Ray American Petroleum Institute Units)
Concentration of Lehnerite per GRapi unit = 256.28 (PPB)
Lehnerite 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)
7.80 ± 1.95 grams of pure Lehnerite .
Estimated Maximum U.S. Postal Shipping Size
(10 mRem/hr limit, Unshielded 100 cm box)
779.52 ±194.88 grams of pure Lehnerite .
Estimated Radioactivity from Lehnerite - 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 / 8.04 cm
91,721,193
2.48E-03
3,901,983.91
1,282.84
100 gm / 3.73 cm
9,172,119
2.48E-04
390,198.39
128.28
10 gm / 1.73 cm
917,212
2.48E-05
39,019.84
12.83
1 gm / 8.04 mm
91,721
2.48E-06
3,901.98
1.28
0.1 gm / 3.73 mm
9,172
2.48E-07
390.20
0.13
0.01 gm / 1.73 mm
917
2.48E-08
39.02
0.01
0.001 gm / 0.80 mm
92
2.48E-09
3.90
0.00
Weight of pure Lehnerite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.67 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
Lehnerite Classification
Dana Class:
40.02a.16.02 (40) Hydrated Phosphates, etc
(40.02a) where A++ (B++)2 (XO4) � x(H2O), containing (UO2)++
(40.02a.16) Dana Group
40.02a.16.01 Bassetite Fe(UO2)2(PO4)2•8(H2O) P 21 /m 2/m
40.02a.16.02 Lehnerite Mn[UO2/PO4]2•8(H2O) P 21 /n 2/m
Strunz Class:
08.EB.10 08 - PHOSPHATES, ARSENATES, VANADATES
08.E - Uranyl Phosphates and Arsenates
08.EB -UO2:RO4 = 1:1
08.EB.10 Bassetite Fe(UO2)2(PO4)2•8(H2O) P 21 /m 2/m
08.EB.10 Lehnerite Mn[UO2/PO4]2•8(H2O) P 21 /n 2/m
08.EB.10 Metazeunerite Cu(UO2)2(AsO4)2•8(H2O) P 4/n 4/m
08.EB.10 Meta-autunite Ca(UO2)2(PO4)2•2-6(H2O) P 4/nmm 4/m 2/m 2/m
08.EB.10 Metauranocircite Ba(UO2)2(PO4)2•6-8(H2O) P 21 2
08.EB.10 Metauranospinite Ca(UO2)2(AsO4)2•8(H2O) P 4/nmm 4/m 2/m 2/m
08.EB.10 Metaheinrichite Ba(UO2)2(AsO4)2•8(H2O) P 21 2
08.EB.10 Metakahlerite Fe(UO2)2(AsO4)2•8(H2O) P 4/mmm 4/m 2/m 2/m
08.EB.10 Metakirchheimerite Co(UO2)2(AsO4)2•8(H2O) P 4/mmm 4/m 2/m 2/m
08.EB.10 Metalodevite Zn(UO2)2(AsO4)2•10(H2O) P 41 /m 4/m
08.EB.10 Metanovacekite Mg(UO2)2(AsO4)2•4-8(H2O) P 4/n 4/m
08.EB.10 Metatorbernite Cu(UO2)2(PO4)2•8(H2O) P 4/n 4/m
08.EB.10 Przhevalskite Pb(UO2)2(PO4)2•4(H2O) Unk Tetra
Other Lehnerite Information
References:
NAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.75,p1433,1990) OPTIC PROP.(Am.Min.,Vol.75,p1433,1990)
See Also:
Links to other databases for Lehnerite :
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 Lehnerite Specimen Label here :
Lehnerite
Mn[UO2/PO4]2•8(H2O)
Dana No: 40.02a.16.02 Strunz No: 08.EB.10
Locality:
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