The spectroscopic preporties and fluorescence decay from Cr

3+

ions in Cd

3

Al

2

Ge

3

O

12

germanate garnets at 295 K and 77 K have been investigated for the first time.In Cd

3

Al

2

Ge

3

O

12

garnet Cr

3+

ions replaced A1

3+

ions occupy at octahedral sites with an intermediate crystal field.It was found that the fluorescence spectra of Cr

3+

in this garnet consist of the broad emission band from 15400 cm

-1

extending to about 11400 cm

-1

two series of R lines and the weaker vibronic spectrum.At room temperature Cr

3+

ions give the strong broad band emission

weaker R lines and vibronic spectrum of R lines

but at 77 K R lines dominate and the broad band decreases considerably.Analysing Cr

3+

spectral results of the germanate garnet indicates that there are two Cr

3+

emission centres to lead the complex emission spectra.The room temperature lifetimes of Cr

3+

broad band emission are from about 570 μs to 300 μs as a function of Cr

3+

concentration.