How can the optical properties of rare-earth doped crystals of Ca1-xRxC2O4 of 1-2 mm size be investigated? Are the crystals too small?

We need advice about experimental technique to  study optical properties of snow-flake shape crystals of doped calcium oxalate that were grown in silica gel. Unfortunately, they have size less...

17 October 2014 4,219 5 View