Bindheimite is a rare mineral that typically appears as a yellow to reddish-brown crystal or granular formation. It belongs to the minerals group known as the pyromorphite group, comprising lead chlorophosphate compounds. The name "Bindheimite" originates from its German discoverer, Augustin Alexandra Bindheim, who first described the mineral in the mid-19th century.
Chemically, bindheimite is composed of lead, chlorine, and phosphate, with the chemical formula Pb2+2Pb3+2Cl[PO4]2. It crystallizes in the hexagonal crystal system and possesses a hardness ranging from 3 to 3.5 on the Mohs scale. Bindheimite often occurs in association with other minerals such as pyromorphite, cerussite, mimetite, and galena.
In terms of its physical properties, bindheimite is known for its interesting crystal formations, which can exhibit tabular or prismatic habits. It has a resinous to waxy luster and a specific gravity of approximately 7.5, indicating its considerable density. Bindheimite is also known to display pleochroism, with various shades of yellow and brown, and can sometimes exhibit fluorescence under ultraviolet light.
Despite its scarcity, bindheimite has been found in various localities worldwide, including Germany, the Czech Republic, Austria, Mexico, and the United States. It is primarily sought after by mineral collectors due to its unique crystal characteristics, vibrant colors, and association with other visually appealing minerals.
