And in the case of sulfur, there seems to be no good reason to continue using the 'ph' form other than perhaps a mistaken sense of spelling jingoism.

Decoding haze sources and formation mechanisms with coal combustion experiments and sulfur isotopes Dec 30, 2024 Rocks at asteroid impact site record first day of dinosaur extinction ...

Through coal combustion experiments and high-precision sulfur isotope analysis, the researchers drew the conclusion that particulate matter from coal combustion is one of the main sources of haze ...

The Curiosity rover has found something surprising: rocks made of pure sulfur ... ridges offer a good look at plenty of layers of Martian rock. The channel is a known source of sulfates ...