Nussierite is a mineral that belongs to the rare mineral group, the apatites. It is a complex phosphate mineral, chemically known as (Na,Ca,K)Al(OH)(PO4)(SO4)·6(H2O). This mineral is named after Nenad N. Nussier, a Serbian mineralogist who made significant contributions to the field.
Nussierite typically occurs as small, prismatic crystals or as grainy aggregates in hydrothermal veins and cavities in rock formations. It commonly forms as a secondary mineral in phosphorus-rich environments, often associated with other phosphate minerals.
The color of nussierite can vary, typically appearing as a pale yellow, yellowish-green, or colorless mineral. It has a transparent to translucent appearance with a vitreous to greasy luster. Nussierite has a relatively low hardness, ranging between 3.5 and 4 on the Mohs scale.
In terms of its chemical composition, nussierite contains sodium (Na), calcium (Ca), potassium (K), aluminum (Al), oxygen (O), phosphate (PO4), and sulfate (SO4) ions. It also contains water molecules incorporated within its crystal structure.
Nussierite is a relatively uncommon mineral and is often sought after by mineral collectors due to its rarity and unique crystal habit. While it does not possess any significant industrial uses, its presence serves as an indicator of specific geological conditions and processes in which it forms.
