H2O in methanol; water addn. of methanol to an aqueous calcium acetate soln., warming to 30-50°C, further addn. of methanol; filtn. of ppt.;

in water; acetic acid step by step addn. of 110 ml glacial acetic acid to suspension of 100 g pptd. CaCO3 in 500-700 ml water; filtration;; vaporization of filtrate on water bath, until pptn. of white flakes, which are H2O free Ca(CH3CO2H)2; after storage of mother lye for few days, crystn. of 1-hydrate, which is purified by recrystn.;;

in water CaCO3 in H2O added to aq. soln. of CH3COOH; stored at room temp. and seeded with cotton thread; crystals collected; detd. by X-ray diffraction;

in water mixt. cement, water and acetic acid (m(water)/m(cement) = 0.6, m(AcOH)/m(cement) = 0.05) was stirred for 1 h and centrifugated, storage at 20°C and 95percent relative hymidity for 4 days; X-ray diffraction;

in water mixt. cement, water and acetic acid (m(water)/m(cement) = 0.6, m(AcOH)/m(cement) = 0.05) was stirred for 1 h and centrifugated, storage at 20°C and 95percent relative hymidity for 6 months; X-ray diffraction;

in water mixing the aq. solns. of Ca(CH3CO2)2*H2O and CuCl2*5H2O (molar ratio=1:1), heating to 50-70°C;; pptn.;;