Fluor-buergerite
Fluor-buergerite is a rare mineral belonging to the tourmaline group. It is a member of the elbaite subgroup and is characterized by its unique chemical composition and physical properties.
Chemical Composition[edit | edit source]
Fluor-buergerite has the chemical formula NaFe^3+_3Al_6(BO_3)_3Si_6O_18(O,OH,F)_4. It is distinguished from other tourmalines by the presence of significant amounts of fluorine (F) in its structure, replacing the hydroxyl group (OH).
Physical Properties[edit | edit source]
Fluor-buergerite typically forms in granite and pegmatite environments. It is known for its dark brown to black color, although it can also appear in shades of yellow-brown. The mineral has a hardness of 7 to 7.5, making it relatively hard and durable. Its crystal system is trigonal, and it often forms prismatic crystals.
Occurrence[edit | edit source]
Fluor-buergerite is primarily found in Mexico, particularly in the San Luis Potosí region. It is often associated with other minerals such as quartz, feldspar, and mica.
History and Etymology[edit | edit source]
The mineral was named in honor of the American mineralogist Martin J. Buerger, who made significant contributions to the field of crystallography. The prefix "fluor-" indicates the presence of fluorine in its composition.
Related Minerals[edit | edit source]
Fluor-buergerite is closely related to other members of the tourmaline group, including dravite, schorl, and elbaite. These minerals share a similar crystal structure but differ in their chemical compositions.
Uses[edit | edit source]
Due to its rarity, fluor-buergerite is primarily of interest to mineral collectors and researchers. It is not commonly used in jewelry or industrial applications.
See Also[edit | edit source]
References[edit | edit source]
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