CaSb

2

O

6

:Mn is an impurity phase in calciumhalophosphate phosphors

which it can influence luminescent properties of phosphors and also shorten the lifetime of phosphors. So far there is only a few work on spectra of Ca-Sb

2

O

6

:Mn. In this paper emission spectra of CaSb

2

O

6

:Mn were measured and investigated in detail.Excitation spectra were measured from 240nm to 340nm. When samples were excited by different wavelengths of ultraviolet light (220

230

240

250

254

260

270

280

290

300

312.6

320)

a series of emissiol.spectra were obtained.Preparation of CaSb

2

O

6

:Mn.1)CaSb

2

O

3

:Mn seperated from commercial calciumhalophosphate phosphors. Dissolve the commercial calciumhalophosphate phosphors by HC1 acid. The insoluble material is CaSb

2

O

6

:Mn which emits a green fluorescence under excitation of UV light.2)Synthesis of CaSb

2

O

6

:Mn.Synthesized CaSb

2

O

6

:Mn was prepared by solids state reaction:raw materials calciumcarbonate

antimony trioxide and manganese carbonate were mixed and then fired at 1100-1200℃ in air for one or two hours.The concentration of Mn is nominally about 1%.In the emission spectra of synthesized CaSb

2

O

6

:Mn or of that seperated from calciumhalophosphate phosphors

a broad emission band near 395nm is observed(Fig.1 and 2).It is found that the intensity of this broad band increases with the increasing of exciting wavelength when the latter is shorter than 254nm

but when the latter is longer than 254nm

the emission intensity decreases (Table 1 and 2).