Ammonium Dihydrogen Phosphate, NH4H2PO4
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  1. This structure has two kinds of tetrahedra

  2. Make two chains of three phosphate ions
  3. Make four more phosphate chains
  4. Connect all phosphate chains Photo
  5. Add ammonium ions to center layer
  6. Add ammonium ions to another layer
  7. All ammonium ions and phosphates
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    Note: In the space-filling representations too large a value has been used for the H+ ionic radius so that hydrogen can be observed.

    Materials with the same crystal structure include KH2PO4, RbH2PO4, NH4H2PO4, KH2AsO4, RbH2AsO4, CsH2AsO4 and NH4H2AsO4.

    Hydrogen atoms on phosphates have half-occupancy bridging between two phosphates and are shown gray instead of white.

Developed in collaboration with the
University of Wisconsin Materials Research Science and Engineering Center
Interdisciplinary Education Group   |   MRSEC on Nanostructured Interfaces
This page created by George Lisensky, Beloit College.  Last modified April 25, 2015 .