physica status solidi (a) · 1994 · 11 citations · 2 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsSolid State PhysicsSolid-state ChemistryCrystal ChemistryCrystal LatticeCrystalline MaterialsOptical Properties Of SolidsPhase TransitionsPiezoelectric MaterialsBirefringenceBirefringence AnalysisIncommensurate TransitionsSecond-order Phase Transitions
The birefringent and piezooptic properties of (MgSiF6) · 6H2O crystals are investigated. The second-order phase transition at Ti = 353 K is observed for the first time. It is shown that the investigated crystals possess properties characteristic of an incommensurate phase in the temperature range 298 to 353 K. The transition temperatures are found to be strongly dependent on the history of the sample.
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