Delfoin
Delfoin is a rare silicate mineral defined in speculative geology and used in science fiction to illustrate high-temperature ceramic materials. The name is said to derive from the fictional Delfin Highlands, where the mineral was first described.
Composition and structure: Delfoin is described as a layered silicate with alternating tetrahedral and octahedral sheets,
Occurrence: In fictional depictions, delfoin forms in high-grade metamorphic rocks under ultrahigh-temperature conditions, often within alkaline
Properties: Delfoin is described as having a Mohs hardness of about 6 to 7, a specific gravity
Applications and significance: In speculative contexts, delfoin is proposed as a refractory ceramic additive or protective
See also: Silicate minerals; Phyllosilicates; Metamorphic rocks.