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[LegoLord]

Oh right, conductivity.  Why didn't I think of that 

Yeah, that really hurts the feasibility of magma freezing instantly.  HOWEVER, being in water at absolute zero would increase the freezing rate because more kinetic energy could be offloaded onto water molecules with each particle collision.  Of course, water at 0 K would be frozen solid, but the magma wouldn't be and could still collide.  Water at 0 K would actually be totally still; there would be no particle vibration.  This is why we have not yet succeeded in creating these conditions.  Personally, I think the only way to reach absolute zero is to have a vacuum totally empty of mass or waves.

[profit]

Oh right, conductivity.  Why didn't I think of that 

Yeah, that really hurts the feasibility of magma freezing instantly.  HOWEVER, being in water at absolute zero would increase the freezing rate because more kinetic energy could be offloaded onto water molecules with each particle collision.  Of course, water at 0 K would be frozen solid, but the magma wouldn't be and could still collide.  Water at 0 K would actually be totally still; there would be no particle vibration.  This is why we have not yet succeeded in creating these conditions.  Personally, I think the only way to reach absolute zero is to have a vacuum totally empty of mass or waves.

They have actually reached absolute zero using lasers. (well close enough at 100 pK (1×10−10K)).  That is less than millionth of a degree above 0K   

[Faces of Mu]

So are we saying that the obsidian raws are bugged and we need to ask Toady to correct its freezing point in the next update? I notice the wiki temperature scale doesn't include any stone, and my for could definitely use another material to make magma proof mechanisms from!

[DennyTom]

Obsidian can survive in magma ... sometimes. Melting temperature of obsidian is between 940 and 1080 degrees of Celsius and temperature of magma is between 700 and 1300 degrees. Therefore obsidian stones will suvive in some magma pools and will not in another ones.

I belive, that if obsidian is or is not magma proof is problem of preferences of player.

[LegoLord]

Oh right, conductivity.  Why didn't I think of that 

Yeah, that really hurts the feasibility of magma freezing instantly.  HOWEVER, being in water at absolute zero would increase the freezing rate because more kinetic energy could be offloaded onto water molecules with each particle collision.  Of course, water at 0 K would be frozen solid, but the magma wouldn't be and could still collide.  Water at 0 K would actually be totally still; there would be no particle vibration.  This is why we have not yet succeeded in creating these conditions.  Personally, I think the only way to reach absolute zero is to have a vacuum totally empty of mass or waves.

They have actually reached absolute zero using lasers. (well close enough at 100 pK (1×10−10K)).  That is less than millionth of a degree above 0K   

But then that's still some energy.  They haven't had an absolute absence of energy, which some people don't think is possibel