Also known as IMA1967-042
Weloganite is a rare carbonate mineral with the formula: It was discovered by Canadian government mineralogist Ann P. Sabina in 1967 and named for Canadian geologist Sir William Edmond Logan (1798–1875). It was first discovered in Francon Quarry, Montreal, Quebec, Canada and has only been reported from a few localities worldwide.
{{Infobox mineral | name = Weloganite | boxwidth = | boxbgcolor =#847463 | boxtextcolor = #fff | image = Weloganite2(11x5.5).jpg | imagesize = 260 | alt = | category = Carbonate mineral | formula = Na2(Sr,Ca)3Zr(CO3)6·3H2O | IMAsymbol = Wlg | molweight = 814.16 g/mol | strunz = 5.CC.05 | dana = 15.3.4.4 | system = Triclinic | class = Pedial (1) (same H-M symbol) | symmetry = P1 | unit cell = a = 8.966 Å, b = 8.98 Å c = 6.73 Å; α = 102.72° β = 116.65°, γ = 60.06°; Z = 1 | color = Yellow, pale yellow, amber, tan, white | colour = | habit = Roughly hexagonal, tapering crystals, pseudorhombohedral | twinning = About [103] repeated at 120 degrees | cleavage = Perfect on pseudo {0001} | fracture = Conchoidal | tenacity = | mohs = | luster = Vitreous | streak = White | diaphaneity = translucent | gravity = 3.20–3.22 | density = | polish = | opticalprop = Biaxial (−) | refractive = nα = 1.558 nβ = 1.646 nγ = 1.640 | birefringence = δ = 0.082 | pleochroism = | 2V = Measured: 15° | dispersion = Weak | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = Pyroelectric. triboluminescent. | prop1 = | prop1text = | references =
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).