Ancylite-(Ce)
Mineral SrCe(CO3)2(OH)·H2O
About it
Small, pale to brown crystals with curved faces in alkaline rocks and carbonatites. Named from the Greek for 'curved', for its rounded crystal faces; fine examples come from Mont Saint-Hilaire, Quebec.
- Type
- Mineral
- Group
- Carbonate (with hydroxide), ancylite group
- Formula
- SrCe(CO3)2(OH)·H2O
- Hardness (Mohs)
- 4–4.5
- Specific gravity
- 3.9–4
- Streak
- white
- Lustre
- vitreous (glassy), greasy
- Crystal system
- Orthorhombic
- Colours
- brown, pale yellow, grey, pink, colourless
- Transparency
- translucent, transparent
- Cleavage and fracture
- none; splintery fracture
Typical values: real specimens vary. For more, see mindat.org.