Azom.com It is usually available in powdered form, but it can be consolidated by pressing and sintering in the presence of vacuum or hydrogen. At room temperature and atmospheric pressure, the element is resistant to hydrochloric acid , alkalis, and aqua regia.
Azom.com It is a very rare metal, occurring at a concentration of only 0.005 ppm in the Earth's crust. Platinum is more ductile than copper, silver and gold, and it does not oxidize at any temperature. It is insoluble in nitric and hydrochloric acid , but ...
