On Sunday, Australia imposed more sanctions on Russia in response to its invasion of Ukraine, prohibiting all alumina and bauxite exports and promising additional weaponry and humanitarian aid.

The export prohibition is meant to have an impact on Russian aluminum production, which depends on Australia for 20% of its alumina.

It comes only days after Canberra sanctioned Russian tycoon Oleg Deripaska, who holds a share in Queensland Alumina Limited, a joint venture between Russian aluminium corporation Rusal and mining behemoth Rio Tinto, which has sworn to cut all relations with Russia.

According to a Rio Tinto spokeswoman, the firm “takes notice of the government’s declaration today about export restrictions” and is still “terminating all commercial relationships it has with any Russian business”.

Australian Prime Minister Scott Morrison spoke on Sunday that his government was working with partners to”put the maximum cost, the maximum pressure on the Putin regime to withdraw from Ukraine.”

Since the start of the invasion, Australia has imposed 476 sanctions on Russian individuals and institutions, according to Morrison.

Following a request from the besieged nation, he announced that Australia would donate 70,000 tonnes of thermal coal to Ukraine.

“”We understand that it can power up to one million homes,”” he replied.