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The Crystal Structure of Sodium Triphosphate Hexahydrate


Dyroff, David Ray (1965) The Crystal Structure of Sodium Triphosphate Hexahydrate. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/FT3A-YQ66.


The crystal structure of sodium triphosphate hexahydrate was determined by X-ray crystallographic methods. The crystals are triclinic with two Na5P3O10.6H2O per unit cell in space group PΤ. The structure of the anion was determined much more accurately than in other triphosphate structures done previously, and the unexpectedly large difference in length of the two types of P-O chain bond was confirmed. The P-O-P angle was 123.5°, which is closer than the previously reported values to what is observed in other kinds of phosphates. Sodium coordination is fivefold and sixfold. An unusual feature of the hydrogen bonding is that two of the phosphate oxygen atoms accept four hydrogen bonds each. Several macroscopic properties of the crystals are explained in terms of the crystal structure.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:(Chemistry and Chemical Engineering) ; sodium triphosphate hexahydrate
Degree Grantor:California Institute of Technology
Division:Chemistry and Chemical Engineering
Major Option:Chemistry
Minor Option:Chemical Engineering
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Hughes, Edward Wesley
Thesis Committee:
  • Unknown, Unknown
Defense Date:10 May 1965
Funding AgencyGrant Number
Record Number:CaltechETD:etd-03262003-155847
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1128
Deposited By: Imported from ETD-db
Deposited On:10 Apr 2003
Last Modified:20 Feb 2024 22:56

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PDF (Dyroff_dr_1965.pdf) - Final Version
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