Assertion: berkelium's structure | /r/HasProperty | austenite
Facets:
Source sentences:
text: For instance, iron changes from a body-centered cubic structure (ferrite) to a face-centered cubic structure (austenite) above 906 °C, and tin undergoes a modification known as tin pest from a metallic form to a semiconductor form below 13.2 °C (55.8 °F).