Albrechtschraufite is a very rare complex hydrated Ca- and Mg-bearing uranyl fluoride carbonate mineral with formula Ca4Mg(UO2)2(CO3)6F2·17H2O. This is a triclinic-pinacoidal yellow-green mineral containing calcium, carbon, fluorine, hydrogen, magnesium, oxygen, and uranium.

General information:

  • Formula: Ca4Mg(UO2)2(CO3)6F217H2O
  • Colour: Yellow-green
  • Lustre: Vitreous
  • Hardness: 2 – 3
  • Specific Gravity: 2.6
  • Crystal System: Triclinic

Chemical Properties of Albrechtschraufite gives us information about the mineral’s chemical composition. A mineral is basically composed of various elements in varied proportions. These elements define how the mineral will behave when exposed to different conditions. The molar weight of albrechtschraufite is 1,428.98 gm. The color of albrechtschraufite is yellow-green. The streak of albrechtschraufite is white. The density of albrechtschraufite is 2.6 g/cm3. The Mohs hardness is 2-3. The luster of albrechtschraufite is vitreous (glassy). These chemical properties also depend on the way the mineral atoms are bound in the mineral’s crystal structure.

It is named after Albrecht Schrauf (1837–1897), Professor of Mineralogy, University of Vienna. Its type locality is Jáchymov, Jáchymov District, Krušné Hory Mountains, Karlovy Vary Region, Bohemia, Czech Republic.

Physical Properties

  • Transparency: Transparent, Translucent
  • Colour: Yellow-green
  • Streak: White
  • Hardness: 2 – 3 on Mohs scale
  • Density: 2.6 g/cm3 (Measured) and 2.67 g/cm3 (Calculated)


Information Source: