Liroconite Mineral Data

[What's New] [Mineral Galleries] [About Us] [Contacts] [Login]
At AA Mineral Specimens, we source quality Mineral Specimens, Fossils, Gemstones,
Decorative Stones, Lapidary Material and Specimen Sets world-wide

General Liroconite Information

Chemical Formula:

Cu2Al(AsO4)(OH)4•4(H2O)

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

Empirical Formula:

Cu₂Al(AsO₄)(OH)₄•4(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1825

Locality:

Wheal Gorland, Gwennap, Cornwall, England, UK Link to MinDat.org Location Data.

Name Origin:

From the Greek, liros - "pale" and konia - "powder."

Name Pronunciation:

Liroconite + Pronunciation

Synonym:

ICSD 69540

PDF 12-526

Liroconite Image

Images:

Liroconite

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

Liroconite Crystallography

Axial Ratios:

a:b:c =1.6719:1:1.3064

Cell Dimensions:

a = 12.665, b = 7.575, c = 9.896, Z = 4; beta = 91.25° V = 949.17 Den(Calc)= 3.03

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/a

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

By Intensity(I/I_o): 6.52(1), 6.03(0.8), 3.005(0.5),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

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

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Burns P C , Eby R K , Hawthorne F C , Acta Crystallographica, Section C , 47 (1991) p.916-919, Refinement of the structure of liroconite,, a heteropolyhedral framework oxysalt mineral, Locality: Roughton Gill, England

Physical Properties of Liroconite

Cleavage:

{100} Indistinct, {011} Indistinct

Color:

Light blue, Green, Sky blue, Verdigris green.

Density:

2.9 - 3, Average = 2.95

Diaphaneity:

Transparent to Translucent

Fracture:

Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

2-2.5 - Gypsum-Finger Nail

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Resinous

Streak:

light blue

Optical Properties of Liroconite

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

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

Electron Density:

Bulk Density (Electron Density)=2.97 gm/cc
note: Specific Gravity of Liroconite =3.03 gm/cc.

Fermion Index:

Fermion Index = 0.000216981
Boson Index = 0.999783019

Photoelectric:

PE_Liroconite= 24.33 barns/electron
U=PE_Liroconite x rElectron Density= 72.19 barns/cc.

Radioactivity:

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

Liroconite Classification

Dana Class:

42.02.01.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.02)where (AB)3 (XO4) Zq · x(H2O)

(42.02.01)Dana Group

42.02.01.01 Liroconite Cu2Al(AsO4)(OH)4•4(H2O) I2/a 2/m

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

References:

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

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 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - MinMax(Deutsch)
13 - MinMax(English)
14 - Mineralienatlas (Deutsch)
15 - Philatelic Mineralogy
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - WWW-MINCRYST

Search for Liroconite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Liroconite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Liroconite Mineral Data :

Ask about Liroconite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Liroconite

Cu2Al(AsO4)(OH)4•4(H2O)
Dana No: 42.02.01.01 Strunz No: 08.DF.20
Locality:

Notes: