Dioleilla

Dioleilla is a fictional mineral term used in some teaching materials and speculative fiction to illustrate concepts in mineralogy and crystallography. It is not recognized by major scientific authorities, and no peer-reviewed description exists.

Etymology and classification: The name combines the prefix 'di-' meaning two, with the root 'ole-' drawn from oleic or oil-like chemistry, and the diminutive suffix '-illa'. In fictional accounts, it is described as a layered silicate or hydrous mineral, placed in the broad category of phyllosilicates for demonstration purposes.

Proposed structure and properties: In illustrative narratives, dioleilla is described as a small, pale mineral with a layered structure. The hypothetical formula is not specified in credible sources, but it is said to form under hydrothermal conditions and to exhibit a vitreous to pearly luster in demonstrations.

Occurrence and uses: Because there are no verified specimens, dioleilla has no known natural occurrence. It is commonly used as a pedagogical example to show how new minerals would be named and described, including notes on crystal symmetry, associations, and potential alteration processes. It is sometimes employed in fiction to explore geologic themes.

Status: As of this writing, dioleilla remains a fictional construct rather than a real mineral. It serves as a useful device for discussing the processes of mineral discovery, description, and the importance of peer review in geology.