clinozoisite

{{Infobox mineral | name = Clinozoisite | image = Clinozoisite, Amphibole Group - Mount Belvidere Quarries, Vermont, USA.jpg | imagesize = 260px | alt = | caption = Clinozoisite | category = Sorosilicates Epidote group | formula = Ca2Al3(Si2O7)(SiO4)O(OH) | IMAsymbol=Czo | strunz = 9.BG.05a | dana = 58.2.1a.4 | system = Monoclinic | class = Prismatic (2/m) (same H-M symbol) | symmetry = P21/m | unit cell = a = 8.879, b = 5.583 c = 10.155 [Å]; β = 115.50°; Z = 2 | color = Colorless, green, gray, light green, yellow green, pink | habit = Elongated primatic crystals, striated; granular to fibrous | twinning = Lamellar on {100} uncommon | cleavage = Perfect on {001} | fracture = Irregular/uneven | tenacity = Brittle | mohs = 6–7 | luster = Vitreous | streak = Grayish white | diaphaneity = Transparent to translucent | gravity = 3.3–3.4 | density = | polish = | opticalprop = Biaxial (+) | refractive = nα = 1.706 – 1.724 nβ = 1.708 – 1.729 nγ = 1.712 – 1.735 | birefringence = δ = 0.006 – 0.011 | pleochroism = | 2V = 14 to 90° measured | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | references = }}

Clinozoisite is a complex calcium aluminium sorosilicate mineral with formula: Ca2Al3(Si2O7)(SiO4)O(OH). It forms a continuous solid solution series with epidote by substitution of iron(III) in the aluminium (m3 site) and is also called aluminium epidote.