Formula: (Mn,Mg)MgSi2O6
Origin of name: For D. Peacock (1937-), University of Michigan
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell: a = 18.38, b = 8.87, c = 5.22
Colour: Yellow-orange
Diaphaneity: Tranparent to translucent
Luster: Vitreous
Habit: Interlocking grains to 3mm
Hardness: 5 to 6
Specific gravity: 3.36
Cleavage: 1; {110} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments: Dimorphous with kanoite
| Back to Alphabetical list | Colour photos | Optical properties/Thin sections | SEM images | TEM images | vibrational spectra description | IR spectra | Raman spectra | N-IR spectra | F-IR spectra | IES spectra |