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THE MINERAL WHITLOCKITE

  • Chemistry: Ca9(Mg, Fe)(PO4)6PO3OH, Calcium Magnesium Iron Phosphate Hydroxide.
  • Class: Phosphates
  • Uses: Only as mineral specimens.
  • Specimens

Whitlockite is a rare phosphate mineral. It was first discovered at the famous phosphate locality - the Palermo Mine, North Groton, Grafton Co., New Hampshire. It can form small, but distinct and well formed crystals.

PHYSICAL CHARACTERISTICS:

  • Color is gray, yellowish, white or colorless.
  • Luster is vitreous.
  • Transparency: specimens are transparent to translucent.
  • Crystal System: is trigonal; 3 m
  • Crystal Habits include rhombohedral and tabular crystals.
  • Cleavage is absent.
  • Fracture is uneven.
  • Hardness is 5.
  • Specific Gravity is approximately 3.1 (average for translucent minerals)
  • Streak is white.
  • Associated Minerals include calcite, montgomeryite, mitridatite, luecophosphite and other phosphate minerals.
  • Notable Occurrences include the type locality of Palermo Mine, North Groton, Grafton Co., New Hampshire, USA as well as Rapid Springs, Yukon, Canada; Spring Creek mine, Flinders Range, Australia and the Tip Top Pegmatite, Custer Co., South Dakota, USA.
  • Best Field Indicators: crystal habit, hardness, color and localities.

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