Haynes 4.89 =link= File

, edited by William M. Haynes, which provides standard physical data for Sodium Chloride (NaCl)

Face-centered cubic (rock-salt lattice) where each ion is octahedrally coordinated by six neighboring ions. Molar Mass: haynes 4.89

If "Haynes 4.89" refers to a specific niche joke, a video game item, or a specific page in a Haynes car manual (e.g., page 4.89), please clarify, and I will rewrite the post to match your exact reference , edited by William M