Lautenthalite Mineral Data

General Lautenthalite Information

Chemical Formula:

PbCu++4(OH)6(SO4)2•3(H2O)

Composition:

Molecular Weight = 809.60 gm

Copper 31.40 % Cu 39.30 % CuO

Hydrogen 1.49 % H 13.35 % H₂O

Lead 25.59 % Pb 27.57 % PbO

Sulfur 7.92 % S 19.78 % SO₃

Oxygen 33.60 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

PbCu₄(OH)₆(SO₄)₂•3(H₂O)

IMA Status:

Approved IMA 1993

Locality:

Lautenthal, Harz Mts, Germany. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Name Pronunciation:

Lautenthalite + Pronunciation

Synonym:

IMA1983-029

Lautenthalite Crystallography

Axial Ratios:

a:b:c =3.5831:1:4.2119

Cell Dimensions:

a = 21.642, b = 6.04, c = 25.44, Z = 8; beta = 108.2° V = 3,159.09 Den(Calc)= 3.40

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 5.14(1), 3.4(0.8), 4.53(0.6),

Physical Properties of Lautenthalite

Cleavage:

{???} Good

Color:

Blue green, Green, Greenish blue.

Density:

3.84

Diaphaneity:

Transparent

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Lautenthalite

Gladstone-Dale:

CI meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.116 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2053,KPDmeas= 0.1818,KC= 0.1839
Ncalc = 1.63 - 1.71

Optical Data:

Biaxial (-), a=1.659, b=1.703, g=1.732, bire=0.0730, 2V(Calc)=76, 2V(Meas)=78-79.

Calculated Properties of Lautenthalite

Electron Density:

Bulk Density (Electron Density)=3.59 gm/cc
note: Specific Gravity of Lautenthalite =3.84 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_{Lautenthalite}= 435.45 barns/electron
U=PE_{Lautenthalite} x rElectron Density=1,561.41 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lautenthalite is Not Radioactive

Lautenthalite Classification

Dana Class:

31.06.01.02 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.06)where (A+ B++)5 (XO4)2 Zqï¿½x(H2O)

(31.06.01)Dana Group

31.06.01.01 Devilline CaCu4(SO4)2(OH)6•3(H2O) P 2₁/c 2/m

31.06.01.02 Lautenthalite PbCu4(OH)6(SO4)2•3(H2O) P 2₁/c 2/m

Strunz Class:

07.DE.70 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DE -With only medium-sized cations; unclassified

07.DE.70 Lautenthalite PbCu4(OH)6(SO4)2•3(H2O) P 2₁/c 2/m

Other Lautenthalite Information

References:

PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)

See Also:

Links to other databases for Lautenthalite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Print or Cut-and-Paste your Lautenthalite Specimen Label here :

Lautenthalite

PbCu++4(OH)6(SO4)2•3(H2O)
Dana No: 31.06.01.02 Strunz No: 07.DE.70
Locality:

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