Formula: MgTiO3
Origin of name: For Sir Archibald Geikie, Scottish geologist
Crystal system: Hexagonal
Crystal class: -3
Twinning:
Unit cell:
Colour: Brownish-black, black
Diaphaneity: Opaque
Luster: Submetallic
Habit: Crystals short prismatic, small; embedded grains
Hardness: 5 to 6
Specific gravity: 4.05
Cleavage: 1; {10-11} distinct
Tenacity:
Streak: Purple-brown
Synonyms/varieties:
Comments: Series with ilmenite
| 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 |