Single crystals of Al1-xGaxPO4 of various mole fractions x were grown from
phosphoric acid solutions under hydrothermal conditions using the slow-heat
ing method. In order to relate the parameters of this low-quartz structure
analogue and the observed phase transitions to the respective mole fraction
, the crystals were investigated by means of electron probe microanalysis.
X-ray powder diffraction and differential thermal analysis. The results are
discussed in terms of the segregation effects occuring during growth. The
limiting geometrical parameters for the existence of the high-quartz phase
are compared to the values given in the literature.