Mineral description : Titanite

Yellow titanite crystals, covered with chlorite from Sulitjelma, Norway.
Black titanite crystals from Innansjön.

Mineral class Silicates : Nesosilicates : Zircon - Titanite group.
Chemical formula CaTi(O/SiO4)
Crystal system Monoclinic.
Habitus Crystals flat envelopeformed. Cross section as a file. Also as grainy aggregates.
Cleavage Three good cleavages, creating wedge formed fractures.
Hardness 5-5.5
Density 3.45
Color Yellowish, light brown to dark brown to black.
Streak White.
Luster Vitreous, transparent to opaque.
Occurance Accessoric in granites, gneiss and schist. Bigger crystals are often found in pegmatites and contact metamorphic limestones.
Associates Diopside, Calcite.
Notes Partly dissolver in hydrochloric acid.
Fuses easily into a dark yellowish glass.
Locations A common mineral in many rocks but with small crystals. Some localities with crystal in Sweden are :
  • Routavaara quartz quarry, Jokkmokk, Lappland. As crystals ut to 1 cm.
  • Hönsarvsberget and Tjärnaberget limestone quarries, Borlänge.
  • Malsjö limestone quarry, Grums, Värmland.
  • Ås brygga, Alnön, Sundsvall. With aegerinaugite.
  • Malmberget mine, Lappland.
  • Grängesbergs mine, Dalarna.
  • Innansjön, Burträsk, Västerbotten. As black crystals up to 3cm in limestone together with green diopside.

To silicate index.
Mineral group index.
Main index.

If you have some questions, suggestions or comments you are welcome to write me a line or two.

To my homepage.
Last changed : 1998-03-07