Calciohilairite, the calcium analog of hilairite is relatively rare at Mont Saint-Hilaire.
PHYSICAL CHARACTERISTICS:
- Color is usually white.
- Luster is vitreous.
- Diaphaneity is transparent to translucent.
- Crystal System is hexagonal; R32.
- Crystal Habits include blocky trigonal crystals.
- Cleavage none.
- Fracture is conchoidal.
- Hardness is 4.
- Specific Gravity is approximately 2.65 g/cm3.
- Streak is white.
- Associated Minerals include ??.
- Distinguishing Features: Crystal habits.
- Origin: Named in 1988 to reflect its composition: the calcium analog
of hilairite.
| Dana class # | 59.2.3.2 – Cyclosilicates; three-membered rings; benitoite group, catapleiite subgroup |
| Strunz class # | VIII/F.29-20 – Silicates; inosilicates (chain and band) six chains [Si6O18]12- and six bands [Si12O30]12-; hilairite – stokesite series |