Mineralpedia Details for Lemoynite
Lemoynite
Named in honor of Charles Lemoyne, known as the Lord of Longuevil, and for his four sons who were well known in French-Canadian history. Lemyoynite is a rare mineral that can be found only at Mont Saint-Hilaire and the Demix quarry in Quebec, Canada, and at Wind Mountain in New Mexico, USA. In Canada it occurs in pegmatites in a gabbro-syenite and in crystal lined cavities in nepheline syenite.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/lemoynite.pdf
- Formula
- Na2CaZr2Si10O26ยท5-6H2O
- Crystal System
- Monoclinic
- Crystal Habit
- Bladed, Prismatic, Wheat Sheaf
- Cleavage
- Perfect, Perfect, Imperfect
- Luster
- Vitreous (Glassy)
- Color
- yellowish white, light blue
- Streak
- white
- Class
- Monoclinic - Prismatic
- Fracture
- Brittle
- Hardness
- 4
- WebMineral
- View Lemoynite
- Mindat
- View Lemoynite
Lemoynite from Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada
Radial groups of prismatic Lemoynite crystals to 2mm.
Click thumbnail images for larger view.
Lemoynite from Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada
- Special Info
- Type Locality
Radial crystal groups of Lemoynite to 4mm across.
Click thumbnail images for larger view.
