Mineralpedia Details for Durangite
Durangite
Named in reference to the type locality at the Barranca mine in the Durango state of Mexico. Other localities for Durangite include in Canada at the Reeves Pit and Lake Ramsay in Nova Scotia, the United States in New Mexico at the Thomas range and in Utah in the Taylor Creek tin District and near Sawmill Creek, and possible in the Cheesewring quarry in Cornwall, England. Durangite occurs in veins through alkalic rhyolite and tin placers that were derived from alkalic rhyolites and in pegmatite dikes through granite.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/durangite.pdf
- Formula
- NaAlAsO4F
- Crystal System
- Monoclinic
- Cleavage
- Indistinct, Distinct, None
- Luster
- Vitreous (Glassy)
- Color
- light yellow, dark green, orange red, red
- Streak
- yellow
- Class
- Monoclinic - Prismatic
- Fracture
- Brittle - Uneven
- Hardness
- 5.5
- WebMineral
- View Durangite
- Mindat
- View Durangite
Durangite from Tin mine, Thomas Range, Juab Co., Utah, United States
Deep red crystals, tabular on 010, to about 0.5mm and smaller to indistinct crystals associated with platy Hematite.
Durangite from Thomas Range, Juab Co., Utah, United States
Orange branching Durangite, a rare arsenate member of the Tilasite group.
