What mineral species are less dense than water? One is evenkite, what is the other one?
I'm gonna say clathrates- or, methane hydrate. There appear to be a couple of molecular arrangements, but this is the crystalline form of methane that exists in the deep ocean.like below 50 atmospheres, at 4-5 degrees C. It's SG is 0.95. Initially, I didn't think it was a mineral, strictly speaking, since our definition of mineral stressed inorganic.back in the Pleistocene when I took Mineralogy. But I saw where your evenkite is a crystalline hydrocarbon too, and proceeded from there. Webmineral, it turns out, lists all manner of so-called hydrocarbon minerals, organic compounds, etc. I'll have to dig out venerable old Klein and Hurlbut. I gotta go back to school.
Ice. Yes, ice is a mineral.
