{{Short description|Sorosilicate mineral}} {{Infobox mineral | name = Jaffeite | boxwidth = | boxbgcolor = | image = Jaffeite.jpg | imagesize = | alt = | caption = A close up picture of the white crystal mineral from a sample from Kombat mine, Namibia | struct image = | struct caption = | struct imagesize = | struct2 image = | struct2 caption = | struct2 imagesize= | SMILES = | Jmol = | category = | formula = {{chem|Ca|6|Si|2|O|7|(OH)|6}} | IMAsymbol = | molweight = | strunz = | dana = | system = | class = | symmetry = | unit cell = | color = | colour = | habit = | twinning = | cleavage = | fracture = | tenacity = | toughness = | mohs = | luster = | streak = | diaphaneity = | gravity = | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | Curie temp = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = | var1 = | var1text = | var2 = | var2text = | var3 = | var3text = | var4 = | var4text = | var5 = | var5text = | var6 = | var6text = }} '''Jaffeite''' is a hydrated calcium silicate with the following chemical formula: {{chem|Ca|6|Si|2|O|7|(OH)|6}}
==Occurrence== The mineral was first found at the Kombat Mine in Namibia. In 1989, the mineral was named after Prof. Howard W. Jaffe (1919–2002) of the University of Massachusetts Amherst.
==References== * [http://webmineral.com/data/Jaffeite.shtml webmineral.com - Jaffeite] * [http://www.minsocam.org/ammin/AM74/AM74_1203.pdf minsocam.org - Jaffeite] * [http://www.mindat.org/min-2063.html Mindat.org - Jaffeite] * [http://www.handbookofmineralogy.com/pdfs/jaffeite.pdf Handbook of Mineralogy - Jaffeite] {{Webarchive|url=https://web.archive.org/web/20121010135636/http://www.handbookofmineralogy.com/pdfs/jaffeite.pdf |date=2012-10-10 }}
Category:Sorosilicates Category:Trigonal minerals Category:Minerals in space group 147