There doesn't seem to be any established spelling of the word "holfertite", nor any definition or context for it. However, using IPA phonetic transcription, one could approximate a possible spelling based on pronunciation. For example, if pronounced as /ˈhɒlfətaɪt/, it may be spelled as "holfertite", with the "e" at the end representing the long "i" sound. It's worth noting that this is just speculation and the actual spelling and pronunciation of the word may vary greatly depending on the intended meaning and origin.