Gasseite

Would you like Gasseite to be treated as a real mineral, or as a fictional mineral used for illustrative purposes? If real, please provide any sources or context you want included. If fictional, I can craft a concise, neutral wiki-style article that presents Gasseite as a hypothetical mineral and covers typical topics such as etymology, composition, properties, occurrence, and use. Also, let me know if you prefer a specific tone or focus (scientific details vs. general overview).