[{"from": "human", "value": "Could you give me a brief overview of this molecule? [Be][=O]"}, {"from": "gpt", "value": "The molecule is an oxide of beryllium that occurs in nature as the mineral bromellite. It is an electrical insulator and is used in rocket engines, catalysts, semiconductors, moderators of atomic reactors, and neutron reflectors. Beryllium is a lightweight alkaline earth metal with the atomic number 4. It is a relatively rare element found naturally only combined with other elements in minerals. (L24, L28)"}]