PDF versionhexagonal-trapezohedral class (hex-ag'-o-nal-tra-pe''-zo-he'-dral). That crystal class in the hexagonal system having symmetry 622.
PDF versionhexagonal-trapezohedral class
PDF versionPDF versionPDF versionPDF versionhexagonal-trapezohedral class (hex-ag'-o-nal-tra-pe''-zo-he'-dral). That crystal class in the hexagonal system having symmetry 622.