In this paper a convenient method of the preparation has been given for green-emitting phosphor Zn

2

GeO

4

·GeO

2

:Mn

2+

which has high luminance

white body colour and even size. By adding excess GeO

2

in the raw material the preparation temperature is lowered

the reaction process is accelerated and the luminance is enhanced.The optimum conditions for the preparation of the sample were summarized in Table 2 and a comparison of its luminarce with certain green phosphors was made(Table 3). Table 3 shows that photolumirarce of this phosphor is higher than that of Zn

2

SiO

4

: Mn

2+

and (Ce

Tb)MAl

11

O

19

.