junitoite

{{Infobox mineral | name = Junitoite | category = Sorosilicate | image = File:Junitoite-744478.jpg | imagesize = 260px | caption = Vitreous to pearly junitoite crystals to 4 mm from the Christmas Mine in Gila County, Arizona | formula = CaZn2Si2O7·H2O | IMAsymbol = Jit | molweight = | strunz = 9.BD.15 | dana = 56.2.1.1 | system = Orthorhombic | class = Pyramidal (mm2) H-M group: (mm2) | symmetry = Ama2 | unit cell = a = 12.510(7) b = 6.318(3) c = 8.561(6) [Å]; Z = 4 | color = Colorless, milk-white, or colored due to alteration | habit = | twinning = | cleavage = Good on {100}; poor on {010} and {011} | fracture = Micaceous | tenacity = Brittle to semi-sectile due to alteration | mohs = 4.5 | luster = Adamantine, Vitreous, Sub-Vitreous | polish = | refractive = nα = 1.656nβ = 1.664nγ = 1.672 | opticalprop = Biaxial (+) | birefringence = δ = 0.016 | 2V = Measured: 86°, Calculated: 88° | dispersion = | pleochroism = | fluorescence= | absorption = | streak = Colorless | gravity = | density = | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = Transparent to translucent | other = | references = }} Junitoite is a mineral with formula CaZn2Si2O7·H2O. It was discovered at the Christmas mine in Christmas, Arizona, and described in 1976. The mineral is named for mineral chemist Jun Ito (1926–1978).

==Description and occurrence== Junitoite is transparent to translucent and is colorless, milk-white, or colored due to alteration. Crystals grow up to and have high quality faces.