Lithium
Li+ (Type I cation)
Sodium
Na+ (Type I cation)
Potassium
K+ (Type I cation)
Rubidium
Rb+ (Type I cation)
Cesium
Cs+ (Type I cation)
Magnesium
Mg2+ (Type I cation)
Calcium
Ca2+ (Type I cation)
Stronium
Sr2+ (Type I cation)
Barium
Ba2+ (Type I cation)