webmin.mindat.orgMineralogy Database

 Index Page Search Webmineral : Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images Share News Help About ☰ Info: Mineral Definition What's New Advertising Search Links Webmaster JAVA Crystals HELP Babelfish Translation: Français Español Italiano Deutschen Portuguêses 日本語 한국어 汉语 Help Index: Axial Ratios Borax Bead Cell Dimensions Chem Form Cleavage Color Chem Crystal System Crystal Form Dana Class Density Diaphaniety Dichroism Emperical form Environments Fermion Flame Tests Tenacity & Fracture Gladstone-Dale Habits IMA status Hardness JCrystal jmol Applet jPOWD Applet Locality Luminescence Luster Magnetic Name Origins Pronunciation Optical Phosphate Bead Pleochroism Radioactivity References Reflectivity (RL) (RL) Anisotrophism (RL) Bireflectance (RL) Color (RL) Pleochroism See Also Streak Strunz Synonyms Unit Cells What's New X-Ray New , Enable Java applets (jPOWD, Krystal) using CheerpJ Applet Runner Plugin for Chrome Browser. How do I enable Java if it's been blocked? How do I enable Java through the Control Panel? The was last updated on 9/5/2012 and it contains 4,714 individual mineral species descriptions with links and a comprehensive image library. Visit the " What's New " section for details. Each mineral has a page linked to tables devoted to crystallography, crystal structures, X-Ray powder diffraction, chemical composition, physical and optical properties, Dana's New classification, Strunz classification, mineral specimen images, and alphabetical listings of mineral species. There also are extensive links to other external sources of mineral data and information. Random Pictures from 4043 Images Pizgrischite © Canadian Mineralogist Julgoldite-(Fe++) © Fabre Minerals Griphite © Jeff Weissman / Photographic Guide to Mineral Species Wulfingite © Thomas Witzke / Abraxas-Verlag Pitticite © Thomas Witzke / Abraxas-Verlag Diaphorite © Lou Perloff / Photo Atlas of Minerals Mineral Images Mineral picture image gallery. php/MySQL database. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Chemical Composition Mineral species by chemical elements selectable from a periodic table or search form. Three options are provided: 1) Sorted by %, 2) Sorted by mineral name or 3) New Custom weight percent element search. Mineral Element Composition Search - To Reset - Click Here Element 1 Wt % Element 1 Element 2 Wt % Element 2 Element 3 Wt % Element 3 Tolerance % What is a Mineral ? Selected mineral definitions spanning the last century defining the mineral kingdom as matter other than that of the plant or animal kingdom. Crystallography This section contains tutorials on the 36 crystal classes. Along with this information are links to tables of each class with all the minerals in that class. Printer-ready PDF files of paper crystal models (assembly required) of the crystal classes can be found here. 3D Crystal models of minerals use JAVA applets from KrystalShaper that can be viewed in a browser window. The rotating form on your left is an actual java applet and not an animated GIF image. If the model is not visible then install JAVA on your PC. Crystal Structures Mineral species and other structures with crystal structure data using the jPOWD applet . The jmol version is located here. X-Ray Powder Diffraction Mineral species searchable by D 1 , D 2 , and D 3 diffraction spacing. New Dana Classification Mineral species by New Dana system. Strunz Classification Mineral species by new Nickel-Strunz system (courtesy of Jim Ferraiolo). Determinative Mineralogy Mineral species by physical and optical properties and by calculated radioactivity . Alphabetical Listing Mineral species listings. The listings include synonyms, quick links to pronunciation, images, and java crystal forms, name origin, and chemical formula. A B C D E F G H I J K L M N O P Q R S T U V W Y X Z All Help Topics Extensive help files that explain mineralogical terms and other features used in webmineral.com including help on Mineral Name Pronunciations and Radioactivity Other Links Links to other sites with mineral data. Alternate Search using Google Web webmineral.com Today is Saturday, 13-Mar-2021 13:15:36 EST Factoid #21 Violent mergers of neutron stars in binary solar systems likely are the main sources of the heaviest chemical elements in the universe. In detailed numerical simulations, the ejected matter from merging neutron stars provides ideal conditions for the relevant reactions of atomic nuclei to take place, producing the heaviest elements in the correct abundances. From Astronomy.com . On top of all this, we have the Late Heavy Bombardment, a period of time approximately 4.1 to 3.8 billion years ago (Ga), during which a large number of asteroids and icy comets impacted Earth. It is this event that added significant amounts of r-process-derived heavy elements to the Earth's crust and, probably, the Earth's oceans. It looks like we owe the lead in our car batteries and gold rings on our fingers to: 1. Neutron star mergers that took place long before our solar system was formed. 2. Fortuitous addition of these elements to the heavily depleted crust left over after these elements migrated to the Earth's iron core. Translate with Intertran Translate using InterTran (tm) Deutsch Fran栩s Espa...