Shannonite is a mineral which belongs to the pyroxene group. The spelling of this word can be explained using IPA transcription as /ˈʃænənaɪt/. The first syllable is pronounced with the "sh" sound, followed by "an" which is pronounced with a short "a" vowel sound. The second syllable "non" is pronounced with a long "o" sound, and the final syllable "ite" is pronounced with a long "i" sound. Therefore, the correct spelling of this mineral is "shannonite" and not "shanonnite" or "shanonite".