IMPALA Platinum Holdings has taken a 15% stake in Aquarius Platinum, the Australian firm said on Thursday. “Aquarius will use the funds to boost working capital for a major push to develop its 100% held Marikana Platinum Project near Rustenburg in South Africa,” Aquarius said. Aquarius will raise A$1,86-million through the share placement, which is being set at 50 cents a share.