Refer to below table for Chromium Physical Properties Densityħ.14 g/cm3(when liquid at m.p density is $6.3 g/cm3) Chromium Symbol: Cr Number: 24 Element category: Transition metal CAS number: Standard atomic weight: 51,9961 Density: 7,14 g/cm3 Hardness: 8,5. All possible symmetric arrangements of particles in three-dimensional space are described by the 230 space groups (219 distinct types, or 230 if chiral copies are considered distinct. The symmetry properties of the crystal are described by the concept of space groups. The positions of the atoms inside the unit cell are described by the set of atomic positions ( x i, y i, z i) measured from a reference lattice point. The unit cell is represented in terms of its lattice parameters, which are the lengths of the cell edges Lattice Constants (a, b and c) aĪnd the angles between them Lattice Angles (alpha, beta and gamma). The unit Cells repeats itself in three dimensional space to form the structure. Elementis is proud to be recognized with the Responsible Chromium label awarded by International Chromium Development Association (ICDA). Eric Waldmann, Senior Vice President, Elementis Chromium. The Crystal structure can be described in terms of its unit Cell. Chromium (Cr) is steel grey lustrous metal, widely distributed in the Earths crust as twentieth most abundant element and mainly exists in nature in. The Responsible Chromium label is a great achievement for our business and demonstrates our commitment to being a responsible provider. The solid state structure of Chromium is Body Centered Cubic.