This lifeform is a carbon based humanoid that uses ammonia instead of water, breathes chlorine gas, and its body uses the mineral olivine to toughen its skin. Its blood is blue; apparently an ammonia-copper mix would be that color. The temperature is colder than the earth average, and there is enough atmospheric pressure to allow the mineral olivine to form on the surface. I know the boiling point of things is dependent on pressure levels. These creatures are good swimmers in the ammonia seas and semi-aquatic. I asked about this creature in another question about why it might have olivine in its skin.
Would these elements work well together? If not, which ones should be changed and which elements would be better to use under the conditions that this creature is a good swimmer and has olivine in it's skin and the pressure is strong enough for olivine to form on the surface?
How would that much pressure effect its body structure?