Chalconatronite – [Na2Cu(CO3)2 · 5H2O]

Chalconatronite is extremely rare at MSH. It was discovered by Dr Andy McDonald of Laurentian University on a few specimens during a field trip in 1998.

PHYSICAL CHARACTERISTICS:

 

  • Color is usually blue or greenish-blue.
  • Luster is (?).
  • Diaphaneity is (?).
  • Crystal System is monoclinic; P21/n.
  • Crystal Habits include anhedral grains and crusts.
  • Cleavage is non existent.
  • Fracture is (?).
  • Hardness is (?).
  • Specific Gravity is approximately 2.27 g/cm3.
  • Streak is (?).
  • Associated Minerals include (?).
  • Distinguishing Features: Color, soluble in water and cold acids.
  • Origin: Named in 1955 after the composition: copper and natron (soda).

 

 

Dana class # 15.2.3.1 – Carbonates; hydrated carbonates
Strunz class # V/D.02-70 – Nitrates, carbonates and borates; water-bearing carbonates without unfamiliar anions; thermonatrite – chalconatronite series