四价的 meaning in Chinese

quadrivalent
quaternary
tetravalent

Carbon is tetravalent .
碳是四价的。
In order to maintain electrical neutrality , some trivalent b ions oxidized to form b4 + , which resulted in a net decrease in the average radius of the b ions , as a result the volume of the unit cell decreases
为保持电中性，一些三价的b离子氧化变成四价的b离子，这一变化导致b位离子平均半径的减小，从而导致晶胞的整体减小。