Russian expulsion a live option: Payne

"There are a range of approaches globally, but the importance of the unity in that coalition ... is a very strong and unified coalition against Russia's illegal war," she told ABC Radio on Thursday.

"We never stopped seeking a diplomatic resolution ... and that is essential."

While the foreign minister said Australia had engaged with Russia's ambassador and its diplomats since the invasion began last month, the government was still considering whether to expel the ambassador.

"I'm not going to speculate on Australia's approach. I have said (expelling the ambassador) remains a live option on the table for this government," she said.

"At the same time, it is potentially useful to have direct lines of communication with, in this case, the Russian government ... we're working with partners we always do to determine the best approaches."

Senator Payne said Australia was working with other G20 nations to determine whether Russian President Vladimir Putin should be allowed to attend this year's summit.

The G20 summit is slated to take place in Indonesia in October.

"These are very sensitive issues we are dealing on, not just in relation to the G20, but multiple international and multilateral organisations where this is a matter that we have to address that," she said.

"We work closely with other members of the G20, particularly Indonesia, on this."

While the invasion in Ukraine remains ongoing, Senator Payne said the sanctions placed on Russia by western nations were a warning to other nations.

"It's a lesson to all authoritarian regimes ... that there is a cost for unilateral action such as this, in this case, the illegal invasion of a country like Ukraine," she said.

US President Joe Biden is heading to Europe to take part in the emergency NATO summit, along with a meeting of the G7 and European Council.

President Biden will also visit Poland, which has taken in more than 3.6 million Ukrainian refugees since the invasion began.