PHASE DIAGRAMS OF SODIUM SULFATE AND SODIUM CHROMATE TO 45 KBAR.
CALIFORNIA UNIV LOS ANGELES INST OF GEOPHYSICS AND PLANETARY PHYSICS
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The phase diagrams of NaSO4 and Na2CrO4 were determined to 45 kbar. Two new high-pressure phases were found for Na2SO4. Eight different solid phases, one of which is metastable, are now known for this substance. Three new high-pressure phases were found for Na2CrO4. The melting curves of Na2SO4 and Na2CrO4 were determined to 7 and 34 kbar, respectively. The initial slopes of the melting curves are identical within experimental error. The phase diagrams of Na2SO4 and Na2CrO4 are strikingly similar, and there are reasons for believing that every known polymorph of Na2CrO4 has an isostructural counterpart in the phase diagram of Na2SO4. Author
- Physical Chemistry