There is mention of a special dividend in the item here;
The 2021 interim dividend and the special dividend to be paid to our Rio Tinto Limited shareholders will be fully franked. The Board expects Rio Tinto Limited to be in a position to pay fully franked dividends for the foreseeable future.
On 23 September 2021, we will pay the 2021 interim dividend and the special dividend to holders of ordinary shares and holders of ADRs on the register at the close of business on 13 August 2021 (record date). The ex-dividend date is 12 August 2021.
Ian.