kartokite

I’m not finding reliable sources for a mineral or entity named “kartokite.” It does not appear in major mineral databases (Mindat, WebMineral, IMA approvals) as a recognized mineral, and I want to avoid presenting invented information as fact. Could you please clarify one of the following?

- Is kartokite a fictional term or a name from a specific work or game?

- Might it be a misspelling or variant of another mineral name (please provide the correct spelling)?

- Do you have a source or locality that you want the article to reflect?

If you’re aiming for a fictional or provisional entry, I can draft a neutral, concise wiki-style article with clear notes about its fictional status.