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Nickel–Strunz classification

Scheme for categorizing minerals

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  • 3 chapters

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As curator of the Mineralogical Museum of Friedrich-Wilhelms-Universität (now known as the Humboldt University of Berlin), Strunz had been tasked with sorting the museum's geological collection according to crystal-chemical properties. His book Mineralogical Tables has been through a number of modifications; the most recent edition, published in 2001, is the ninth, having been revised by Ernest Henry Nickel. The IMA/CNMNC supports the Nickel–Strunz database.

Nickel–Strunz code scheme

The Nickel–Strunz code scheme is NN.XY.##x, where:

  • NN: Nickel–Strunz mineral class number
  • X: Nickel–Strunz mineral division letter
  • Y: Nickel–Strunz mineral family letter
  • ##x: Nickel–Strunz mineral/group number; x an add-on letter

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