Preparation and properties of complex Ti(III) fluorides

79

I69 PREPARATlONANDPROPERTIESOFCOMPLEX

Ti(III)FLUORIDES

S. SteviC,M.Dragojevicand M. Fertilio Faculty of Technology

and Metallurgy,University of Belgrade.

Karnegijeva4, 11001 Belgrade(Yugoslavia)

Three different potassium

fluorotitanate(II1)

have been synthesized

in 10% HCl with ammonium-

directly

oomplexes

of ammonium

by the reaction

and potassium-fluoride.

and

of TiCl

3 The ratio of the

reagents was: TiCl : NH4F(KF) = 1 : 5, 1 : 6 and 1 : 8, recpecti3 vely. All compounds were obtained as precipitates of characteriswith a Ti/F ratio = 1 : 5, a brownish

tic colour:

A/TiF3(0H)(H20$/ precipitate let colour

(A=NHq, K), was obtained.

appeared

when a compound

was produced

A2/TiF5/

when A3/TiF6/

precipitated.

and dried in vacua over concentrated

no formation

of peroxytitanates(IV)

Fluoride

ion exchange

structural

is described

in acidic together

characterization.

of

colour of

was formed,

with ethanol

complexes

precipitate

Red-violet

and vio-

When washed sulfuric

acid,

occurred.

solutions

of fluorotitanates(II1)

with some preliminary

work on