Ludlamite is a rare phosphate mineral with chemical formula . It was first described in 1877 for an occurrence in Wheal Jane mine in Cornwall, England and named for English mineralogist Henry Ludlam (1824–1880).
{{infobox mineral | name = Ludlamite | image = Ludlamite-md87a.jpg | imagesize = 200px | alt = | caption = | category = Phosphate mineral | formula = | IMAsymbol = Lud | molweight = | strunz = 8.CD.20 | dana = | system = Monoclinic | class = Prismatic (2/m) (same H-M symbol) | symmetry = P21/a | unit cell = a = 10.541(5), b = 4.646(4) c = 9.324(5) [Å]; β = 100.52°; Z = 2 | color = Apple-green to bright green | colour = | habit = Tabular crystals; massive, granular | twinning = | cleavage = Cleavage: perfect on {001}, indistinct on {100} | fracture = | tenacity = | mohs = 3.5 | luster = Vitreous, pearly on cleavage | streak = Pale greenish white | diaphaneity = Translucent | gravity = 3.12–3.19 | density = | polish = | opticalprop = Biaxial (+) | refractive = nα = 1.650 - 1.653 nβ = 1.669 - 1.675 nγ = 1.688 - 1.697 | birefringence = δ = 0.038 - 0.044 | pleochroism = | 2V = Measured: 82° | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | references = }}
Ludlamite is a rare phosphate mineral with chemical formula . It was first described in 1877 for an occurrence in Wheal Jane mine in Cornwall, England and named for English mineralogist Henry Ludlam (1824–1880).
via Wikipedia infobox
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).