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Neptunium arsenide

Chemical compound From Wikipedia, the free encyclopedia

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Neptunium arsenide is a binary inorganic compound of neptunium and arsenic with the chemical formula NpAs.[1] The compound forms crystals.

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Synthesis

Heating stoichiometric amounts of pure substances:

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Physical properties

Neptunium arsenide forms crystals of several modifications:[2][3]

  • Cubic system, space group Fm3m, cell parameters a = 0.5835 nm, exists at temperatures below –131 °С.
  • Tetragonal system, cell parameters a = 0.58312 nm, c = 0.58281 nm, exists in the temperature range –131 to –98 °С.
  • Cubic system, space group Fm3m, cell parameters a = 0.58318 nm, exists at temperatures above –98 °C.

Neptunium arsenide becomes antiferromagnetic at 175 K.[4][5][6]

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References

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