kampfite

{{Infobox mineral | name = Kampfite | image = Traskite (brown)-Kampfite (bluish).jpg | imagesize = 260px | alt = | caption = Traskite (brown) and Kampfite (bluish), from Big Creek, Fresno County, California, United States of America | category = Phyllosilicate minerals | formula = | IMAsymbol = Kpfb | strunz = 9.EG.20 | dana = | system = Monoclinic | class = Domatic (m) (same H-M symbol) | symmetry = Cc | unit cell = a = 31.2329, b = 5.2398 c = 9.0966 [Å]; β = 106.933°; Z = 1 | color = Light blue gray | habit = Irregular grains or anhedral crystal inclusions | twinning = | cleavage = Good on {001} | fracture = Uneven | tenacity = Brittle | mohs = 3 | luster = Vitreous | streak = White | diaphaneity = Translucent | gravity = 3.45 | density = | polish = | opticalprop = Uniaxial – (strongly pseudohexagonal) | refractive = nω = 1.642 nε = 1.594 | birefringence = δ = 0.048 | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = }} Kampfite is a rare barium silicate–carbonate–halide mineral with the chemical formula . Discovered in 1964 and described in 2001, it is named after Anthony R. Kampf. The mineral is known only from Fresno County, California.

==Description== Kampfite is translucent and light blue-gray in color. Specimens occur as irregular masses up to in size.