Stenonite is a mineral that belongs to the pyroxene group of minerals. Its chemical formula is MgSiO3, and it has a monoclinic crystal structure. The spelling of stenonite can be explained using the International Phonetic Alphabet (IPA) transcription. The first syllable is pronounced as /stɛn/, with the "e" pronounced as a short vowel sound. The second syllable is pronounced /ən/, with a neutral or schwa sound. The final syllable is pronounced /aɪt/, with the "i" pronounced as a long vowel sound.