Chromo-alumino-povondraite

chromo-alumino-povondraite

NaCr₃(Al₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃OChemical formula

TrigonalCrystal system

7.5Mohs hardness

Facts

Chemical formula: NaCr₃(Al₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O
Crystal system: Trigonal
Mohs hardness: 7.5
Elements in formula: Sodium, Chromium, Aluminium, Magnesium, Silicon, Oxygen, Boron, Hydrogen
Number of elements: 8
IMA status: Approved
Type locality: Pereval marble quarry
Named after: Chromium