Paramagnetic Resonance of Chromic Ions in Double Nitrate Crystals and Frozen Solution

Chromic ions are shown to enter double nitrate crystals in two different interstitial sites, and the spin Hamiltonian parameters for these ions have been determined. It is also shown that cloudy double nitrate crystals contain occluded solution and the amount of solution contained in a number of crystals has been measured. The paramagnetic resonance properties of frozen samples of the solution from which the chromium-doped double nitrate crystals were grown have been investigated. The results reported in this paper are compared with the nuclear orientation results for ${\mathrm{Cr}}^{51}$ in cerium magnesium nitrate obtained by Kaplan and Shirley. The utility of frozen solutions for nuclear orientation experiments is discussed.