THE MINERAL FEDORITE
- Chemistry: (NA, K)2-3(Ca, Na)7(Si4O8)(Si4O10)3(F, Cl, OH)2 - 3.5H2O,
Hydrated Sodium Potassium Calcium Silicate Fluoride Chloride Hydroxide.
- Class: Silicates
- Subclass: Phyllosilicates
- Uses: Only as mineral specimens.
Fedorite is a rare alkali mineral from the famous
Kola Peninsula, of Russia.
It is named for one of the founders of modern crystallography, Russian scientist Evgraf Stepanovich Fedorov.
It forms nice "mica" like crystals that can have an attractive light red color.
Fedorite crystals can be found in veins cutting through sandstone beds associated with minerals such as
- Color is white, colorless and light raspberry-red.
- Luster is vitreous to pearly.
- Transparency: Crystals are transparent.
- Crystal System is triclinic; bar 1
- Crystal Habits include pseudohexagonal tabular crystals similar to mica books.
- Cleavage is perfect in one direction (basal).
- Specific Gravity is approximately 2.4 to 2.6 (average)
- Streak is white.
- Associated Minerals are
- Notable Occurrences include the type locality of Turyiy Peninsula,
Kola Peninsula and
Murun massif, Russia.
- Best Field Indicators are crystal habit, color, luster, associations and locality.