Tallytahvlitest

Tallytahvlitest is a fictional mineral species created for educational and speculative worldbuilding contexts. It is described in teaching materials and hobbyist fiction as a rare aluminum silicate mineral that forms in hydrothermal veins within granitic host rocks in the imagined Tallytahv Basin. The entry is used to illustrate standard mineral description conventions rather than to report an observed natural specimen.

Etymology and naming are straightforward in the fictional account. The name tallytahvlitest combines the imagined Tallytahv region with the common mineral suffix -lite, which is often used to designate mineral species in real-world nomenclature.

Occurrence and formation are described within a hypothetical geological setting. In the fictional narrative, tallytahvlitest occurs in a single quarry and is produced by high-temperature hydrothermal activity. It is said to be commonly associated with minerals such as quartz, muscovite, and tourmaline, reflecting typical hydrothermal assemblages.

Composition and structure are presented as an aluminum silicate framework with minor alloying elements. The described empirical formula is approximate, such as Al2Si4O10(OH)2 with traces of iron and calcium. It is tentatively assigned to an aluminosilicate group and is reported to crystallize in a monoclinic system, though full crystallographic confirmation is stated as pending in the fictional dataset.

Physical properties attributed to tallytahvlitest include a Mohs hardness around 6 to 6.5, a vitreous luster, and a color range from pale emerald-green to pale blue. Crystals are described as translucent to transparent, with a calculated density near 3.2 g/cm3 and imperfect cleavage along one plane.

Classification and significance note that tallytahvlitest serves as a didactic example rather than a verified mineral. It is used to demonstrate nomenclature, descriptive terminology, and the process of mineral characterization in an educational context. No verified specimens or peer-reviewed publications exist for tallytahvlitest.