Lautenthalite Mineral Data

Lautenthalite Mineral Data +

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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.

Synonym:

IMA1983-029

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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 - PrismaticH-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

Diaphaniety:

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

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:

r_electron=3.59 gm/cc
note: r_{Lautenthalite}=3.84 gm/cc.

Fermion Index

Fermion Index = 0.05731
Boson Index = 0.94269

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Lautenthalite is Not Radioactive

Lautenthalite Classification

Dana Class:

31.6.1.2 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.6)where (A+ B++)5 (XO4)2 Zq·x(H2O)

(31.6.1)Dana Group

31.6.1.1 Devilline CaCu4(SO4)2(OH)6·3(H2O) P 2₁/c 2/m

31.6.1.2 Lautenthalite PbCu4(OH)6(SO4)2·3(H2O) P 2₁/c 2/m

Strunz Class:

VI/D.19-32 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/D - Water-bearing sulfates with unfamiliar anions. Cations of medium and very big size

VI/D.19 - Devilline - Serperite - Rapidcreekite series

VI/D.19-05 Niedermayrite! Cu4Cd(SO4)2(OH)6·4(H2O) P 2₁/m 2/m

VI/D.19-10 Devilline CaCu4(SO4)2(OH)6·3(H2O) P 2₁/c 2/m

VI/D.19-20 Serpierite Ca(Cu,Zn)4(SO4)2(OH)6·3(H2O) C 2/c 2/m

VI/D.19-30 Orthoserpierite Ca(Cu,Zn)4(SO4)2(OH)6·3(H2O) P ca2₁ mm2

VI/D.19-32 Lautenthalite PbCu4(OH)6(SO4)2·3(H2O) P 2₁/c 2/m

VI/D.19-35 Arzrunite Cu4Pb2SO4(OH)4Cl6·2(H2O) Unk Ortho

VI/D.19-40 Tatarskite Ca6Mg2(SO4)2(CO3)2Cl4(OH)4·7(H2O) Unk Ortho

VI/D.19-50 Tanteuxenite-(Y) (Y,Ce,Ca)(Ta,Nb,Ti)2(O,OH)6 Pcan 2/m 2/m 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 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

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Lautenthalite

PbCu++4(OH)6(SO4)2·3(H2O)
Dana No: 31.6.1.2 Strunz No: VI/D.19-32
Locality:

Notes: