Mineralpedia Details for Chalcophyllite
Chalcophyllite
Named from the Greek words chalkos, meaning “copper,” and phyllo, meaning “leaf,” in reference to the minerals copper content as well as its platy, leaf-like habit. Chalcophyllite is an uncommon mineral that occurs as a secondary mineral in oxidized arsenic-bearing hydrothermal, polymetallic deposits. Localities for Chalcophyllite include in Germany, Austria, Russia, England, France, the United States, Chile, and New Zealand as well as other more minor localities.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/chalcophyllite.pdf
- Formula
- Cu18Al2(AsO4)4(SO4)3(OH)24·36H2O
- Crystal System
- Trigonal
- Crystal Habit
- Platy, Tabular, Massive - Lamellar
- Cleavage
- Perfect, None, None
- Luster
- Vitreous - Pearly
- Color
- emerald green, bluish green, grass green
- Streak
- pale green
- Class
- Trigonal - Hexagonal Scalenohedral
- Fracture
- Uneven
- Hardness
- 2
- WebMineral
- View Chalcophyllite
- Mindat
- View Chalcophyllite
Chalcophyllite from Majuba Hill mine, Pershing Co., Nevada, United States
Thick tabular hexagonal crystals to 2.5mm.
Chalcophyllite from Wheal Gorland, St. Day dist., Cornwall, England
Green platy crystals with hexagonal outlnes to 8mm across.
Chalcophyllite from Piesky, Špania Dolina, Banská Bystrica, Slovakia
This tabular hexagonal plates of Chalcophyllite with liberal coverage. Nice representative specimen from this classic arsenate locality of Europe.
Chalcophyllite from Špania Dolina, Stare Hory near Banská Bystrica, Slovakia
Excellent, well-formed, hexagonal platy crystals to 1mm throughout Azurite matrix.
Chalcophyllite from Gwennap, Cornwall, England
Pastel green, thin tabular crystals to 6mm.
Chalcophyllite from Chuquicamata mine, El Loa Prov., Antofagasta, Chile
Attractive uncommon copper arseate, Chalcophyllite, with distinct crystals to about 0.5mm across the face.
