Tarbuttite, pronounced as /tɑːˈbʌtʌɪt/, is a mineral species that belongs to the family of phosphate mineral. Its chemical formula is Zn2(PO4)(OH), and it was first discovered in Broken Hill, New South Wales, Australia. The spelling of the word "tarbuttite" has been derived from its name, which is named after Charles Edward Tarbutt, a British geologist. The correct pronunciation of this word can be tricky, but its phonetic transcription shows that it has four syllables, and the stress falls on the second syllable.
Tarbuttite is a mineral that belongs to the family of phosphates. Its chemical formula is Zn2(PO4)(OH), indicating that it is composed of zinc (Zn), phosphorus (P), oxygen (O), and hydroxide (OH) ions. This mineral is named after its discovery location in the Tarbutt Township, Ontario, Canada.
Tarbuttite forms in the oxidation zones of lead-zinc-silver ore deposits and is commonly found as a secondary mineral. It typically occurs in the form of small, transparent to translucent crystals, which can be colorless, white, or pale yellow. The crystals may appear prismatic or tabular, and often exhibit various crystal habits. Tarbuttite is known for its glassy or vitreous luster and commonly displays a perfect cleavage.
The physical properties of tarbuttite include a hardness of 3 to 4 on the Mohs scale, which makes it relatively durable but still vulnerable to scratches. It has a specific gravity of around 4.14 g/cm3, denoting its denser nature compared to average rocks and minerals.
Tarbuttite is mainly sought after by mineral collectors due to its rarity and unique crystal habits. However, it does not have significant industrial applications. Despite its limited usage, tarbuttite is of scientific interest as it provides insight into the geological processes and conditions that lead to the formation of various secondary minerals in ore deposits.
The word "tarbuttite" is derived from the name of the Scottish mineralogist, Robert Tarbutt. Tarbutt discovered the mineral in 1908 in Namibia, and it was subsequently named in his honor.