However , the crystal structure may change to lower symmetries at lower temperatures , for example , P2 , P1 , or P2 2 2 .
At higher temperatures the crystal structure is cubic P2 3 .
The crystal structure may change to lower symmetries at lower temperatures , for example , P2 , P1 , or P2 2 2 .
At higher temperatures the crystal structure is cubic P2 3 .