https://lpi.oregonstate.edu/mic/minerals/manganese
HOWEVER
Linus Pauling was also a legit brilliant chemist that won two nobel prizes and authored over 1000 papers
He created "quantum chemistry" and "molecular biology"
And was also a big peace activist
So he is forgiven for the Vitamin C stuff
https://en.wikipedia.org/wiki/Linus_Pauling
https://lpi.oregonstate.edu/mic/minerals/manganese