Keywords: Polyhalite crystal structure.png en Crystal structure of polyhalite - K<sub>2</sub>Ca<sub>2</sub>Mg SO<sub>4</sub> <sub>4</sub>·2H<sub>2</sub>O http //rruff geo arizona edu/doclib/hom/polyhalite pdf Schlatti M Sahl K Zemann A Zemann J Colour code 4B0082 Potassium K indigo 66FF00 Magnesium Mg bright green 138808 Calcium Ca green red Oxygen O red ff00ff Water H<sub>2</sub>O magenta ffffff Cell white 2014-06-18 23 34 33 own MarinaVladivostok cc-zero Uploaded with UploadWizard Polyhalite Crystal structures |