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  1. Hexagonal crystal family - Wikipedia

    In crystallography, the hexagonal crystal family is one of the six crystal families, which includes two crystal systems (hexagonal and trigonal) and two lattice systems (hexagonal and …

  2. Hexagonal system | Definition & Facts | Britannica

    Among the primary crystal systems, the hexagonal system has the fewest substances assigned to it, including arsenic, calcite, dolomite, quartz, apatite, tourmaline, emerald, ruby, cinnabar, and …

  3. Crystal Systems Explained: The 7 Types Of Crystal Structures In ...

    Corundum, including ruby and sapphire, forms hexagonal crystals often modified by rhombohedral faces. The tourmaline group showcases complex hexagonal structures with triangular cross …

  4. Donald B Peck - Crystallography: The Hexagonal System

    The crystals that are in the hexagonal crystal system are among the easiest to recognize. Their cross section, viewed from the termination, is usually hexagonal.

  5. Hexagonal Crystal Structure — Definition, Properties and Examples

    Oct 5, 2025 · Hexagonal Crystal Structure is a crystal system in which the atoms are arranged in a four-axis arrangement, three horizontal axes of equal length and one vertical axis. This …

  6. Hexagonal: Definition, Facts, and Varieties Explained

    The hexagonal crystal system encompasses a range of mineral structures that share specific geometric and symmetry properties. It is characterized by its distinctive axis arrangement, …

  7. Hexagonal crystal system - University of Waterloo

    Hexagonal crystal system The hexagonal system has four crystallographic axes consisting of three equal horizontal, or equilateral axes at 120 degrees to each other, as well as one vertical …

  8. Crystal Systems Explained: Cubic, Hexagonal, Trigonal & More

    Sep 16, 2025 · This guide explores the geology, symmetry, and real-world examples behind each system so you can better appreciate, buy, and display your crystals. Whether you’re a …

  9. Hexagonal System Definition - Intro to Geology Key Term | Fiveable

    In the hexagonal system, crystals have a unique arrangement where three axes are of equal length and lie in a plane at 120-degree angles to each other, while the fourth axis is …

  10. Hexagonal Crystal System I - metafysica.nl

    The three equatorial (horizontal) equivalent crystallographic axes (red lines) of the Hexagonal Crystal System. These axes are sometimes denoted as a, b and d axes.