Mendipite is a rare mineral that was named for the locality where it is found, the Mendip Hills in Somerset, England. It is an oxyhalide of lead with formula Pb3Cl2O2.
{{Infobox mineral | name = Mendipite | category = Halide mineral | boxwidth = | boxbgcolor = | image = Mendipite-160217.jpg | imagesize = 220px | caption = | formula = Pb3Cl2O2 | IMAsymbol = Mdi | molweight = 724.50 g/mol | strunz = 3.DC.70 Oxyhalide | dana = 10.3.1.1 | system = Orthorhombic | class = Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) | symmetry = Pnma or P212121, | unit cell = a = 9.52 Å, b = 11.87 Å, c = 5.87 Å; Z = 4 | color = Colorless to white, brownish cream, grey, yellowish, pink, red, or blue; nearly colorless in transmitted light. | habit = Columnar or fibrous aggregates, often radiated, and cleavable masses. | twinning = | cleavage = Perfect on {110}, fair on {100} and {010} | fracture = Conchoidal to uneven | tenacity = | mohs = to 3 | luster = Pearly to silky on cleavages; resinous to adamantine on fractures. | refractive = nα = 2.240, nβ = 2.270, nγ = 2.310 | opticalprop = Biaxial (+) | birefringence = δ = 0.070 | pleochroism = | 2V = Measured: 90°, calculated: 84° | streak = White | gravity = 7.24 | melt = | fusibility = | diagnostic = | solubility = Soluble in dilute nitric acid, HNO3 | diaphaneity = Translucent, rarely transparent | other = | references = }}
Mendipite is a rare mineral that was named for the locality where it is found, the Mendip Hills in Somerset, England. It is an oxyhalide of lead with formula Pb3Cl2O2.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).