Tanmasyla

Tanmasyla is a term used in geology and speculative fiction to designate a hypothetical silicate mineral that could form under high-temperature, high-pressure hydrothermal conditions. In non-fiction discussions, tanmasyla is described as a potential end-member mineral in silicate systems, introduced to illustrate phase transitions and crystal-chemistry constraints. The name is a neologism that has appeared in various theoretical models and in fictional settings since the early 21st century; there is no widely recognized mineral with this name in current mineralogical databases such as Mindat or the IMA list of minerals.

In proposed descriptions, tanmasyla is characterized by transparent to translucent crystals, with color variations from pale blue to green. It is said to exhibit moderate hardness (approximately 5–6 on the Mohs scale), good basal cleavage, and notable optical properties such as birefringence and strong refractivity under ultraviolet light. Crystal habit is described as prismatic to tabular, forming intergrowths in hydrothermal assemblages.

Occurrence and status: Tanmasyla remains unconfirmed in the physical record. No authentic mineral specimen has been peer-reviewed and published as tanmasyla; therefore it is considered hypothetical. In educational and fictional contexts, tanmasyla is used to discuss mineral stability fields, alteration pathways, and the interpretation of metamorphic histories.

Etymology: The term is a coined name, with no established linguistic origin in real-world languages.