ravimite

Ravimite is a fictional silicate mineral described in educational and literary contexts to illustrate the behavior of framework silicates. In the standard fictional scheme, its chemical formula is RvSi2O7, where Rv denotes a hypothetical divalent cation that resides in channels within a three-dimensional silicate framework built from SiO4 tetrahedra linked by shared oxygens.

It crystallizes in a monoclinic system and typically presents prismatic to tabular crystals. Physical properties commonly cited include a vitreous to pearly luster, a color range from emerald-green to olive, a hardness of about 6 on the Mohs scale, and a white streak. The mineral is described as transparent to translucent.

Ravimite is said to form in late-stage hydrothermal veins within granitic to granodioritic rocks, often alongside quartz, tourmaline, and apatite. Reported localities in fictional sources include the Ravine District of the Kirent Range; other occurrences are noted in theoretical models and simulations used in mineralogical pedagogy.

In laboratory contexts, ravimite can be produced by hydrothermal synthesis or solid-state reaction routes that introduce the ravium cation into a silica-rich lattice under elevated temperature and pressure. Its hypothetical properties are used to discuss framework stability, cation size effects, and diffusion in silicate networks.

Notes: Ravimite does not exist as a recognized mineral in real-world mineralogy; it is used here as a fictional example to illustrate mineralogical concepts.