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Chalcophyllite Mineral Data

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General Chalcophyllite Information

Help on Chemical  Formula: Chemical Formula: Cu++18Al2(AsO4)3(SO4)3(OH)27•33(H2O)
Help on Composition: Composition: Molecular Weight = 3,010.49 gm
   Aluminum   1.79 %  Al    3.39 % Al2O3
   Copper    37.99 %  Cu   42.78 % Cu2O
   Arsenic    7.47 %  As   11.45 % As2O5
   Hydrogen   3.31 %  H    29.62 % H2O
   Sulfur     3.20 %  S     7.98 % SO3
   Oxygen    46.24 %  O
            ______        ______ 
            100.00 %       95.22 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu18Al2(AsO4)3(SO4)3(OH)27•36(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1847
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, "copper" and fyllon, "leaf."
Help on Name Pronunciation: Name Pronunciation: Chalcophyllite Say CHALCOPHYLLITE
Help on Synonym: Synonym: ICSD 100289
  PDF 39-1356

Chalcophyllite Image

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Comments: Altered rhyolite vug lined with chalcophyllite crystals. The largest crystal is 0.5 cm across and several have the perfect "stop sign" hexagon form.
Location: Majuba Hill Mine, Pershing County, Nevada, USA. Scale: Picture size 2 cm.
© John Veevaert

Chalcophyllite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:5.3389
Help on Cell Dimensions: Cell Dimensions: a = 10.77, c = 57.5, Z = 3; V = 5,776.04 Den(Calc)= 2.60
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.59(1), 4.79(1), 9.54(1),
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: ( 1 1 1) ( 0 0 1)

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Physical Properties of Chalcophyllite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Emerald green, Bluish green, Grass green.
Help on Density: Density: 2.4 - 2.66, Average = 2.53
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Massive - Lamellar - Distinctly foliated fine-grained forms.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: pale green

Optical Properties of Chalcophyllite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.023 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.05 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2286,KPDmeas= 0.2349,KC= 0.2405
Ncalc = 1.58 - 1.64
Help on Optical Data: Optical Data: Uniaxial (-), e=1.552-1.575, w=1.618-1.632, bire=0.0570-0.0660.

Calculated Properties of Chalcophyllite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.50 gm/cc
note: Specific Gravity of Chalcophyllite =2.53 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0004665649
Boson Index = 0.9995334351
Help on Photoelectric: Photoelectric: PEChalcophyllite = 21.40 barns/electron
U=PEChalcophyllite x rElectron Density= 53.59 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Chalcophyllite is Not Radioactive

Chalcophyllite Classification

Help on  Dana Class: Dana Class: (43)Compound Phosphates, etc.
  (43.05)(Hydrated Compound Anions With Hydroxyl or Halogen)
  (43.05.14)Dana Group Chalcophyllite Cu18Al2(AsO4)3(SO4)3(OH)27•33(H2O) R 3m 3 2/m
Help on  Strunz Class: Strunz Class: 08.DF.30 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DF -With only medium-sized cations, (OH,etc.):RO4 > 3:1
08.DF.30 Chalcophyllite Cu18Al2(AsO4)3(SO4)3(OH)27•33(H2O) R 3m 3 2/m

Other Chalcophyllite 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 Chalcophyllite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - Philatelic Mineralogy
15 - QUT Mineral Atlas
16 - Ruff.Info

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Dana No: Strunz No: 08.DF.30





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