Mineralogy Database

Lautenthalite Mineral Data

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General Lautenthalite Information

Help on Chemical  Formula: Chemical Formula: PbCu++4(OH)6(SO4)2•3(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: PbCu4(OH)6(SO4)2•3(H2O)
Help on IMA Status: IMA Status: Approved IMA 1993
Help on Locality: Locality: Lautenthal, Harz Mts, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the locality.
Help on Name Pronunciation: Name Pronunciation: Lautenthalite + Pronunciation Say LAUTENTHALITE
Help on Synonym: Synonym: IMA1983-029

Lautenthalite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.5831:1:4.2119
Help on Cell Dimensions: Cell Dimensions: a = 21.642, b = 6.04, c = 25.44, Z = 8; beta = 108.2° V = 3,159.09 Den(Calc)= 3.40
Help on Crystal System: 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/Io): 5.14(1), 3.4(0.8), 4.53(0.6),

Physical Properties of Lautenthalite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Blue green, Green, Greenish blue.
Help on Density: Density: 3.84
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Lautenthalite

Help on Gladstone-Dale: 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
Help on Optical Data: 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

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.59 gm/cc
note: Specific Gravity of Lautenthalite =3.84 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PELautenthalite = 435.45 barns/electron
U=PELautenthalite x rElectron Density=1,561.41 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lautenthalite is Not Radioactive

Lautenthalite Classification

Help on  Dana Class: Dana Class: (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.06)where (A+ B++)5 (XO4)2 Zq�x(H2O)
  (31.06.01)Dana Group Devilline CaCu4(SO4)2(OH)6•3(H2O) P 21/c 2/m Lautenthalite PbCu4(OH)6(SO4)2•3(H2O) P 21/c 2/m
Help on  Strunz Class: 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

Help on References: References: PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)
Help on See Also: 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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Dana No: Strunz No: 07.DE.70





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