Why is platinum useful for laboratory crucibles and electrodes?

Platinum is highly valued for laboratory crucibles and electrodes primarily due to its physical and chemical durability. It possesses a very high melting point, allowing it to withstand the extreme temperatures required for heating materials in laboratory settings.12

Furthermore, platinum exhibits excellent resistance to corrosion and chemical attack. Its surface remains stable even when heated to white heat in air, and it is largely unaffected by most simple acids. Because it resists both high temperatures and the chemical degradation caused by electric arcs, it is an ideal material for electrical contacts and sparking points as well. To enhance these properties, small amounts of iridium are often added to create a stronger alloy that retains the benefits of pure platinum.2