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Chalcophyllite

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Formula:
Cu18Al2(SO4)3(AsO4)3(OH)27 · 33H2O
System:
Trigonal
Colour:
Emerald green, grass ...
Lustre:
Sub-Adamantine, Vitreous, Pearly
Hardness:
2
Name:
From the Greek χαλκός (chalcos) for "copper" and φύλλον (phullon) for "leaf," in allusion to the composition, containing copper, and the platy habit of the crystals.
An uncommon secondary mineral occurring in the oxidised zones of some arsenic-bearing hydrothermal polymetallic deposits.
Can be partially dehydrated.

Related to, but distinct from barrotite.

May be confused with tabular spangolite.

Classification of Chalcophyllite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
8.DF.30

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
F : With only medium-sized cations, (OH,etc.):RO4 > 3:1
43.5.14.1

43 : COMPOUND PHOSPHATES, ETC.
5 : Hydrated Compound Phosphates, etc·, Containing Hydroxyl or Halogen
22.3.6

22 : Phosphates, Arsenates or Vanadates with other Anions
3 : Phosphates, arsenates or vanadates with sulphates
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Occurrences of Chalcophyllite

Geological Setting:
Oxidised zone of arsenic bearing polymetallic hydrothermal deposits.

Physical Properties of Chalcophyllite

Sub-Adamantine, Vitreous, Pearly
Diaphaneity (Transparency):
Transparent, Translucent
Comment:
Lustre pearly on {0001}, and possibly overall, especially on partial dehydration
Colour:
Emerald green, grass green, bluish green, blue; green in transmitted light
Streak:
Pale green to bluish green
Hardness (Mohs):
2
Cleavage:
Perfect
Perfect on {0001}, micaceous; in traces on {1011}.
Density:
2.67 - 2.69 g/cm3 (Measured)    2.684 g/cm3 (Calculated)

Crystallography of Chalcophyllite

Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
R3
Cell Parameters:
a = 10.756(2) Å, c = 28.678(4) Å
Ratio:
a:c = 1 : 2.666
Unit Cell Volume:
V 2,873.30 ų (Calculated from Unit Cell)
Morphology:
Crystals platy, six-sided with a hexagonal aspect, flattened on {0001}, with prominent {0112}. May exhibit numerous other forms and may be striated triangularly on {0001}; forms rosettes: also drusy, foliated, massive.
Twinning:
On {1010} as twin plane.
Comment:
Z = 1.5

Crystallographic forms of Chalcophyllite

Crystal Atlas:
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Chalcophyllite no.6 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

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X-Ray Powder Diffraction Data:
d-spacingIntensity
9.47 (100)
7.10 (18)
4.71 (31)
3.59 (12)
2.67 (25)
2.58 (48)
2.34 (32)
(

Optical Data of Chalcophyllite

Type:
Uniaxial (-)
RI values:
nω = 1.618 - 1.632 nε = 1.552 - 1.575
Max Birefringence:
δ = 0.066
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Weak
Comments:
O = Bluish green
E = Nearly colourless
Comments:
Indices of refraction vary markedly depending on the relative humidity since the water content varies at ambient temperature.

Chemical Properties of Chalcophyllite

Formula:
Cu18Al2(SO4)3(AsO4)3(OH)27 · 33H2O
Essential elements:
All elements listed in formula:

Relationship of Chalcophyllite to other Species

8.DF.05HotsoniteAl11(SO4)3(PO4)2(OH)21 · 16H2O
8.DF.10BolivariteAl2(PO4)(OH)3 · 4-5H2O
8.DF.10EvansiteAl3(PO4)(OH)6 · 6H2O
8.DF.10Liskeardite[(Al,Fe)32(AsO4)18(OH)42(H2O)22] · 52H2O
8.DF.10Rosièresite(Pb, Cu, Al, P, O, H)
8.DF.15Rusakovite(Fe3+,Al)5(VO4,PO4)2(OH)9 · 3H2O
8.DF.20LiroconiteCu2Al(AsO4)(OH)4 · 4H2O
8.DF.25SieleckiiteCu3Al4(PO4)2(OH)12 · 2H2O
8.DF.35ParnauiteCu9(AsO4)2(SO4)(OH)10 · 7H2O
8.DF.40GladiusiteFe2(Fe,Mg)4(PO4)(OH)11(H2O)
22.3.1ParnauiteCu9(AsO4)2(SO4)(OH)10 · 7H2O
22.3.2ArdealiteCa2(HPO4)(SO4) · 4H2O
22.3.3Machatschkiite(Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2O
22.3.4ClinotyroliteCa2Cu9(AsO4,SO4)4(OH,O)10 · 10H2O
22.3.5PeisleyiteNa2Al9[(P,S)O4]8(OH)6•28H2O
22.3.7WoodhouseiteCaAl3(PO4)(SO4)(OH)6
22.3.8Schlossmacherite(H3O)Al3(SO4)2(OH)6
22.3.9SvanbergiteSrAl3(PO4)(SO4)(OH)6
22.3.10KemmlitziteSrAl3(AsO4)(SO4)(OH)6
22.3.11SanjuaniteAl2(PO4)(SO4)(OH) · 9H2O
22.3.12KribergiteAl5(PO4)3(SO4)(OH)4 · 4H2O
22.3.13HotsoniteAl11(SO4)3(PO4)2(OH)21 · 16H2O
22.3.14WeileriteBaAl3(AsO4)(SO4)(OH)6
22.3.15TsumebitePb2Cu(PO4)(SO4)(OH)
22.3.16ArsentsumebitePb2Cu(AsO4)(SO4)(OH)
22.3.17HinsdalitePbAl3(PO4)(SO4)(OH)6
22.3.18HidalgoitePbAl3(AsO4)(SO4)(OH)6
22.3.19Orpheite
22.3.20CoconinoiteFe23+Al2(UO2)2(PO4)4(SO4)(OH)2 · 20H2O
22.3.21Sasaite(Al,Fe3+)14(PO4)11(SO4)(OH)7 · 83H2O
22.3.22Tristramite(Ca,U,Fe)(PO4,SO4) · 2H2O
22.3.23CorkitePbFe3(PO4)(SO4)(OH)6
22.3.24BeudantitePbFe3(AsO4)(SO4)(OH)6
22.3.25DiadochiteFe23+(PO4)(SO4)(OH) · 5H2O
22.3.26SarmientiteFe23+(AsO4)(SO4)(OH) · 5H2O
22.3.27BukovskýiteFe23+(AsO4)(SO4)(OH) · 9H2O
22.3.28ZýkaiteFe43+(AsO4)3(SO4)(OH) · 15H2O
22.3.29TooeleiteFe63+(As3+O3)4(SO4)(OH)4 · 4H2O
22.3.30Pitticite(Fe, SO4, AsO4, H2O) ?
22.3.31Xiangjiangite(Fe3+,Al)(UO2)4(PO4)2(SO4)2(OH) · 22H2O

Other Names for Chalcophyllite

Other Information

Other Information:
Soluble in acids and in ammonia.

Water content varies at room temperature based on relative humidity.

Alters to Chrysocolla.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Chalcophyllite

Reference List:
Haüy, R.J. (1801) Traité de minéralogie. First edition: in 4 volumes with atlas in fol.: 3: 509 (as Cuivre arseniaté lamelliforme).

Vauquelin (1801) Journal des mines: 10: 562.

Karsten in Hoffmann, C.A.S. (1801): 1: 543 (as Blättriges Olivinerz).

Ludwig, C.F. (1803) Handbuch der Mineralogie nach A.G. Werner. 2 volumes, Leipzig: 180 (as Kupferglimmer).

Jameson, R. (1820) A System of Mineralogy. third edition, 3 volumes (as Copper Mica).

Beudant, F.S. (1832), Traité élémentaire de Minéralogie, second edition, 2 volumes: 2: 598 (as Erinite).

Breithaupt, A. (1832) Vollständige Characteristik etc. 2nd. Ed.: 42 (as Kupferphyllit).

Des Cloizeaux (1845) Annales de chimie et de physique, Paris: 13: 420 (as Erinite ?).

Breithaupt, A. (1847) Vollständige Handbuch der Mineralogie. Dresden and Leipzig. Vol. 3: 149 (as Chalcophyllit).

Brooke, H.J. and Miller, W.H. (1852) Introduction to Mineralogy by Wm. Phillips, London, 1823. New edition by Brooke and Miller. 8vo, London: 512 (as Tamarite).

Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 840.

Hartley (1898) Mineralogical Magazine: 12: 120.

Gaubert (1904) Bulletin de la Société française de Minéralogie: 27: 223-224 (as Métachalcophyllite).

Palache, C. and Merwin (1909) American Journal of Science: 28: 537.

Goldschmidt, V. (1918) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 5: 68.

Shannon (1924) American Journal of Science: 7: 31.

Piazza, M. (1931): Contributo alla conoscenza della composizione della calcofillite. Periodico di Mineralogia – Roma: 2: 104-121.

Palache, C., Berman, H., & Frondel, C. (1951) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 1008-1010.

Federico, M. (1955) Ricerche roentgenografiche sulla calcofillite. Periodico di Mineralogia – Roma, 13-21.

Corbett, R.K. (1973) X-ray “powder” data for chalcophyllite. Amer. Mineral., 58, 792–793.

Sabelli, C. (1980) The crystal structure of chalcophyllite. Zeitschrift für Kristallographie: 151: 129-140.

Read, A.J. (1986) Chalcophyllite and other rare hydroxy-sulfates from Maharahara, New Zealand. Mineralogical Record, 17, 199–204.

Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (2000) Handbook of Mineralogy, Volume IV. Arsenates, Phosphates, Vanadates. Mineral Data Publishing, Tucson, AZ, 680pp.: 102.

Internet Links for Chalcophyllite

Specimens:
The following Chalcophyllite specimens are currently listed for sale on minfind.com.

Localities for Chalcophyllite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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