Fluorapophyllite-(K), formerly known as apophyllite-(KF) and sometimes simply referred to as fluorapophyllite, is the most common mineral of the apophyllite group, with the chemical formula of KCa4Si8O20(F,OH)·8(H2O). It gets the first part of its name, "fluor", because it contains more fluorine than hydroxide compared to the other minerals in the apophyllite group.
Images
File:Fluorapophyllite-Stilbite-Ca-indi-94b.jpg|Stilbite crystals surround a pastel green, translucent fluorapophyllite crystal File:Apophyllite-(KF)-66684.jpg|Isolated apophyllite cluster on contrasting matrix File:Apophyllite-(KF)-131740.jpg|A radial cluster of cubically-tipped apophyllite crystals File:Apophyllite-(KF)-Stilbite-Ca-Calcite-171681.jpg|Light green form from Pune District, Maharashtra, India ==References==