Scawtite is a hydrous calcium silicate mineral with carbonate, formula: Ca7(Si3O9)2CO3·2H2O. It crystallizes in the monoclinic crystal system as thin plates or flat prisms.
{{infobox mineral | name = Scawtite | image = Scawtite.jpg | alt = | caption = | category = Silicate mineral | formula = Ca7(Si3O9)2CO3·2H2O | IMAsymbol = Scw | strunz = 9.CK.15 | dana = 64.2.1.1 | system = Monoclinic | class = Prismatic (2/m) (same H-M symbol) | symmetry = C2/m | unit cell = a = 10.12 Å, b = 15.18 Å c = 6.62 Å; β = 100.55°; Z = 2 | color = Colorless | habit = Platy - micaceous, parallel to radiating clusters | twinning = | cleavage = Perfect on {001}, poor on {010} | fracture = | tenacity = | mohs = 4–5 | luster = Vitreous | streak = | diaphaneity = Transparent | gravity = 2.77 | density = | polish = | opticalprop = Biaxial (+) | refractive = nα = 1.597 - 1.603 nβ = 1.606 - 1.609 nγ = 1.618 - 1.621 | birefringence = δ = 0.021 | pleochroism = | 2V = Measured from 74° to 78° | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = }} Scawtite is a hydrous calcium silicate mineral with carbonate, formula: Ca7(Si3O9)2CO3·2H2O. It crystallizes in the monoclinic crystal system as thin plates or flat prisms.
Scawtite was first described in 1929 for an occurrence at Scawt Hill in Northern Ireland.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).