Passage: LiF is prepared from lithium hydroxide or lithium carbonate with hydrogen fluoride. It can be also generated by reacting the sulfur hexafluoride with the metallic lithium, as in the engine of Mark 50 torpedo, but this pathway is not used industrially due to the high cost of reagents.

Question: What are the components of LiF?
lithium hydroxide or lithium carbonate with hydrogen fluoride