Monodisperse vaterite type calcium carbonate, its manufacturing method and method of controlling growth of particles and shape thereof

A composition comprising spherical, ellipsoidal or plate-shaped calcium carbonate satisfying the requirements of (a), (b), (c), (d), (e), (f) and (g) below;

• (a) 0.1 .mu.m.ltoreq.DS1.ltoreq.2.0 .mu.m
• (b) 0.04 .mu.m.ltoreq.DS2.ltoreq.2.0 .mu.m
• (c) 1.0.ltoreq.DS1 / DS2.ltoreq.20
• (d) DP3 /DS1.ltoreq.1.25
• (e) 1.0.ltoreq.DP2 / DP4.ltoreq.2.5
• (f) 1.0.ltoreq.DP1 / DP5.ltoreq. 4.0
• (g) (DP2-DP40) / DP3.ltoreq.1.0
• where:
• DS1:
• Mean particle size (.mu.m, major axis) of primary particles as determined by the aid of a scanning electron microscope;
• DS2:
• Mean particle size (.mu.m, minor axis) of primary particles as determined by the aid of a scanning electron microscope;
• DP1:
• Mean particle size (.mu.m) for a total of 10% by weight counted from larger particle size side on the basis of the particle size distribution determined by the aid of a light transmission particle size distribution tester;
• DP2:
• Mean particle size (.mu.m) for a total of 25% by weight counted from larger particle size side on the basis of the particle size distribution determined by the aid of a light transmission particle size distribution tester;
• DP3:
• Mean particle size (.mu.m) for a total of 50% by weight counted from larger particle size side on the basis of the particle size distribution determined by the aid of a light transmission particle size distribution tester;
• DP4:
• Mean particle size (.mu.m) for a total of 75% by weight counted from larger particle size side on the basis of a particle size distribution determined by the aid of the light transmission particle size distribution tester;
• and
• DP5:
• Mean particle size (.mu.m) for a total of 90% by weight counted from larger particle size side on the basis of the particle size distribution determined by the aid of a light transmission particle size distribution tester.