Linarite Mineral Data

Linarite Mineral Data +

General Linarite Information

Chemical Formula:

PbCu(SO4)(OH)2

Composition:

Molecular Weight = 400.82 gm

Copper 15.85 % Cu 17.85 % Cu₂O

Hydrogen 0.50 % H 4.49 % H₂O

Lead 51.69 % Pb 55.69 % PbO

Sulfur 8.00 % S 19.97 % SO₃

Oxygen 23.95 % O

______ ______

100.00 % 98.00 % = TOTAL OXIDE

Empirical Formula:

PbCu(SO₄)(OH)₂

Environment:

Secondary, weathered zone of ore deposits.

IMA Status:

Valid Species (Pre-IMA) 1839

Locality:

Linares, Spain. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Synonym:

ICSD 68173

PDF 30-493

Linarite Image

Images:

Linarite

Comments: Deep blue prismatic crystals of linarite on matrix.
Location: Mammoth mine, Tiger, Pinal County, Arizona, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Linarite Macphersonite

Comments: Colorless macphersonite with blue linarite.
Location: Leadhills, Strathclyde, Scotland, UK. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Linarite Schulenbergite

Comments: Light greenish rosettes of schulenbergite with small green crystals of ramsbeckite and blue crystals of linarite.
Location: Gelbe Birke Mine, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Linarite Brochantite

Comments: Deep blue, acicular, linarite with light blue, globular brochantite on white quartz.
Location: Goulmina, Er Rachidia, Morroco. Scale: Crystal size 1.5 cm.
© Fabre Minerals

Images:

Linarite

Comments: Deep blue, blocky, linarite crystal blades in quartz vug and breccia matrix.
Location: Grand Reef Mine in Graham County, Arizona, USA. Scale: 8 cm by 7 cm.
© Kevin Ward

Linarite Crystallography

Axial Ratios:

a:b:c =1.7151:1:0.8295

Cell Dimensions:

a = 9.6913, b = 5.6503, c = 4.6873, Z = 2; beta = 102.66° V = 250.43 Den(Calc)= 5.32

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/m

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

By Intensity(I/I_o): 3.151(1), 4.521(0.6), 3.556(0.55),

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Effenberger H , Mineralogy and Petrology , 36 (1987) p.3-12, Crystal structure and chemical formula of schmiederite, Pb2Cu2(OH)4(SeO3)(SeO4),, with a comparison to linarite PbCu(OH)2(SO4), Locality: Leadhills, Scotland

Physical Properties of Linarite

Cleavage:

[100] Perfect, [001] Distinct

Color:

Sky blue, Deep blue.

Density:

5.3 - 5.5, Average = 5.4

Diaphaniety:

Transparent to Translucent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Platy - Sheet forms (e.g. micas).

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

2.5 - Finger Nail

Luminescence:

None.

Luster:

Vitreous (Glassy)

Magnetism:

Nonmagnetic

Streak:

light blue

Optical Properties of Linarite

Gladstone-Dale:

CI meas= 0.071 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.057 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.157,KPDmeas= 0.1547,KC= 0.1665

Optical Data:

Biaxial (-), a=1.809, b=1.838, g=1.859, bire=0.0500, 2V(Calc)=78, 2V(Meas)=80. Dispersion relatively weak.

Pleochroism (x):

none.

Pleochroism (y):

none.

Pleochroism (z):

none.

Calculated Properties of Linarite

Electron Density:

r_electron=4.70 gm/cc
note: r_Linarite=5.32 gm/cc.

Fermion Index

Fermion Index = 0.11495
Boson Index = 0.88505

Photoelectric:

PE_Linarite= 906.63 barns/electron
U=PE_Linarite x r_electron=4,259.80 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Linarite is Not Radioactive

Linarite Classification

Dana Class:

30.2.3.1 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen

(30.2)where (A B)2 XO4 Zq

(30.2.3)Dana Group

30.2.3.1 Linarite PbCu(SO4)(OH)2 P 2₁/m 2/m

Strunz Class:

VI/B.10-10 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/B - Waterfree sulfates [SO4]2- with unfamiliar anions. cations of medium size

VI/B.10 - Linarite - Mammothite series

VI/B.10-10 Linarite PbCu(SO4)(OH)2 P 2₁/m 2/m

VI/B.10-20 Schmiederite Pb2Cu2(SeO3)(SeO4)(OH)4 P 2₁/m 2/m

VI/B.10-30 Chenite Pb4Cu(SO4)2(OH)6 P1 1

VI/B.10-40 Elyite Pb4Cu(SO4)O2(OH)4·(H2O) P 2₁/c 2/m

VI/B.10-50 Mammothite Pb6Cu4AlSbO2(SO4)2Cl4(OH)16 C 2/m 2/m

Other Linarite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

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

Linarite

PbCu(SO4)(OH)2
Dana No: 30.2.3.1 Strunz No: VI/B.10-10
Locality:

Notes: