To provide square plate-like zinc oxide particles which is a novel shape which has not hitherto been known and a production method thereof.SOLUTION: The ratio of the length of the long side to the length of the short side (the length of the long side / the length of the short side) is 1.00 to 1.30, the ratio of the length of the long side to the thickness Side length / thickness) is 3 to 100. 4. A quadrangular plate-like zinc oxide particle,(FIG.【課題】これまで知られていない新規な形状である四角板状酸化亜鉛粒子及びその製造方法を提供する。【解決手段】長辺の長さと短辺の長さの比(長辺の長さ/短辺の長さ)が1.00~1.30であり、長辺の長さと厚みの比(長辺の長さ/厚み)が3~100であることを特徴とする四角板状酸化亜鉛粒子。【選択図】図1
