The spelling of the word "grothite" follows standard English phonetic patterns. The first syllable, "groth," is pronounced with a long "o" sound as in "go" and a voiced "th" sound. The second syllable, "ite," has a short "i" sound as in "bit" and a voiced "t" sound. Therefore, the IPA phonetic transcription for "grothite" is /ˈɡrɑːθaɪt/. Overall, the spelling of "grothite" accurately represents its pronunciation in Standard English.