Formula: Ca(Fe,Mg)6(SiO4)2(PO4)2
Origin of name: For James Harrison (1915-1990), Canadian geologist, former director of the Canadian Geological Service
Crystal system: Hexagonal
Crystal class: -3 2/m
Twinning:
Unit cell: a = 6.248, c = 26.802
Colour: Yellow-brown to orange-brown
Diaphaneity: Translucent to transparent
Luster: Vitreous
Habit: Anhedral equidimensional grains
Hardness: 4-5
Specific gravity: 4.02
Cleavage: 1; Poor
Tenacity: Brittle, conchoidal
Streak: Pale yellow
Synonyms/varieties:
Comments:
| 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 |