Mineralogy Database

Liroconite Mineral Data

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General Liroconite Information

Help on Chemical  Formula: Chemical Formula: Cu2Al(AsO4)(OH)4•4(H2O)
Help on Composition: Composition: Molecular Weight = 433.08 gm
   Aluminum   6.23 %  Al   11.77 % Al2O3
   Copper    29.35 %  Cu   36.73 % CuO
   Arsenic   17.30 %  As   26.54 % As2O5
   Hydrogen   2.79 %  H    24.96 % H2O
   Oxygen    44.33 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu2Al(AsO4)(OH)4•4(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1825
Help on Locality: Locality: Wheal Gorland, Gwennap, Cornwall, England, UK Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, liros - "pale" and konia - "powder."
Help on Name Pronunciation: Name Pronunciation: Liroconite + Pronunciation Say LIROCONITE
Help on Synonym: Synonym: ICSD 69540
  PDF 12-526

Liroconite Image

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Comments: Large crystals of liroconite up to 1.3 cm.
Location: Gwennap, Cornwall, England. Scale: 6 x 3 cm.
© John Veevaert

Liroconite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.6719:1:1.3064
Help on Cell Dimensions: Cell Dimensions: a = 12.665, b = 7.575, c = 9.896, Z = 4; beta = 91.25° V = 949.17 Den(Calc)= 3.03
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: I2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.52(1), 6.03(0.8), 3.005(0.5),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 0 1 1) ( 1 1 0)

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Physical Properties of Liroconite

Help on Cleavage: Cleavage: {100} Indistinct, {011} Indistinct
Help on Color: Color: Light blue, Green, Sky blue, Verdigris green.
Help on Density: Density: 2.9 - 3, Average = 2.95
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: light blue

Optical Properties of Liroconite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2133,KPDmeas= 0.2191,KC= 0.2147
Ncalc = 1.62 - 1.65
Help on Optical Data: Optical Data: Biaxial (-), a=1.612, b=1.652, g=1.675, bire=0.0630, 2V(Calc)=72, 2V(Meas)=67. Dispersion none.

Calculated Properties of Liroconite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.97 gm/cc
note: Specific Gravity of Liroconite =3.03 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.000216981
Boson Index = 0.999783019
Help on Photoelectric: Photoelectric: PELiroconite = 24.33 barns/electron
U=PELiroconite x rElectron Density= 72.19 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Liroconite is Not Radioactive

Liroconite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.02)where (AB)3 (XO4) Zq � x(H2O)
  (42.02.01)Dana Group Liroconite Cu2Al(AsO4)(OH)4•4(H2O) I2/a 2/m
Help on  Strunz Class: Strunz Class: 08.DF.20 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DF -With only medium-sized cations, (OH,etc.):RO4 > 3:1
08.DF.20 Liroconite Cu2Al(AsO4)(OH)4•4(H2O) I2/a 2/m

Other Liroconite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Liroconite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Dunn)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - Philatelic Mineralogy
16 - QUT Mineral Atlas
17 - Ruff.Info

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Dana No: Strunz No: 08.DF.20





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