Knopite is a mineral with the chemical formula MgSiO3·H2O. The spelling of "knopite" is determined by its pronunciation, which is represented by the IPA phonetic transcription as /ˈnɒpɪt/. The initial "k" is silent, and the "n" is pronounced as "n" in "no." The "o" in the first syllable is pronounced as in "not," and the second syllable is pronounced as "pit." The spelling may seem unusual, but it follows the standard rules of English phonetics.