Yttrocrasite is a rare and unique mineral that falls under the classification of complex arsenate mineral. It is composed of a combination of various elements, including yttrium (Y), calcium (Ca), thorium (Th), arsenic (As), oxygen (O), and hydrogen (H). Yttrocrasite typically forms as granular masses or prismatic crystals, often exhibiting a yellow to brownish-yellow coloration.
This mineral possesses a specific gravity of around 4.92, indicating its relatively high density, and it crystallizes in the tetragonal crystal system. Yttrocrasite's crystal structure is characterized by its axial symmetry with well-defined crystal faces. Its crystallographic axes have unequal lengths and intersect at right angles.
Originating from the crevices and openings of hydrothermal veins and pegmatites, yttrocrasite is primarily found in association with other rare minerals, such as thorite, zircon, fluorite, allanite, and other arsenates and phosphates. It forms under specific geological conditions that involve the combination of yttrium-rich fluids and arsenic-bearing solutions.
The mineral has gained interest among collectors and researchers due to its scarcity, unique chemical composition, and distinctive crystal structure. Its scientific study aids in understanding the geological processes responsible for its formation and provides insight into the role of yttrium and other associated elements in mineralization.
