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What are the three forms of iron?

What are the three forms of iron?

Iron as an element is not in common use. However, the term iron is used for different materials which contain a high percentage of iron in elemental form. These materials are categorized as (i) pure iron, (ii) wrought iron, (iii) cast iron, (iv) pig iron, and (v) direct reduced iron.

What is iron carbide used for?

The primary use of the product is as a metallic charge during steelmaking for substitution of hot metal, direct reduced iron, or steel scrap. Iron carbide is an intermetallic compound of iron and carbon. It is, more precisely, intermediate transition metal carbide.

Is chromium FCC or BCC?

The bcc and fcc, with their higher densities, are both quite common in nature. Examples of bcc include iron, chromium, tungsten, and niobium. Examples of fcc include aluminium, copper, gold and silver.

How many atoms are in a FCC 111 plane?

2 atoms

Is Zinc FCC or BCC?


v t e Crystal structure of elements in the periodic table
3 Li BCC 4 Be HCP
11 Na BCC 12 Mg HCP
19 K BCC 20 Ca FCC 30 Zn HCP

Is BCC or FCC more dense?

Because FCC atoms are arranged more closely together than BCC atoms, FCC metals will tend to be more dense and more stable. This is a very broad rule, however! Tungsten, one of the densest metals, is BCC. However, you can do one classic experiment to see the density change between BCC and FCC.

Is titanium FCC or BCC?

Table 1: Crystal Structure for some Metals (at room temperature)

Aluminum FCC Nickel
Cadmium HCP Niobium
Copper FCC Titanium
Gold FCC Vanadium
Iron BCC Zinc

What crystal structure is titanium?


What is the difference between hcp and fcc?

The hexagonal closest packed (hcp) has a coordination number of 12 and contains 6 atoms per unit cell. The face-centered cubic (fcc) has a coordination number of 12 and contains 4 atoms per unit cell. The body-centered cubic (bcc) has a coordination number of 8 and contains 2 atoms per unit cell.

What type of lattice is ice?

hexagonal ice crystal

What is fcc structure?

In the face-centred cubic (fcc) arrangement, there is one additional iron atom at the centre of each of the six faces of the unit cube. In the hcp and the fcc structures the spheres fill 74 percent of the volume, which represents the closest possible packing of spheres. Each atom has 12 neighbours.

Is graphite FCC or BCC?

List of lattice constants

Material Lattice constant (Å) Crystal structure
C (graphite) a = 2.461 c = 6.708 Hexagonal
Si 5.431020511 Diamond (FCC)
Ge 5.658 Diamond (FCC)
AlAs 5.6605 Zinc blende (FCC)

Is BCC an iron?

Between room temperature and 912oC, iron has the BCC structure, and is a tough, hard metal (“tough as nails”). Above 912oC, pure iron switches over to the FCC (austenite) structure, which is much more ductile.

Why does iron change from bcc to fcc?

Iron atoms are arranged in a body-centered cubic pattern (BCC) up to 1180 K. The transition from BCC to FCC results in an 8 to 9% increase in density, causing the iron sample to shrink in size as it is heated above the transition temperature.

What is the atomic radius of bcc crystal structure?

Sodium (Na) exhibits body-centered-cubic (BCC) crystal structure with atomic radius 0.186 nm.


The relation between edge length (a) and radius of atom (r) for BCC lattice is 3a =4r.

What are the different types of crystal structure?

The Seven Crystal Systems

  • Triclinic System: All three axes are inclined towards each other, and they are of the same length.
  • Monoclinic System:
  • Orthorhombic System:
  • Trigonal System:
  • Hexagonal System:
  • Tetragonal Systems:
  • Cubic System:

What is the atomic radius of simple cubic structure?

In a simple cubic lattice, the unit cell that repeats in all directions is a cube defined by the centers of eight atoms, as shown in Figure 4. Atoms at adjacent corners of this unit cell contact each other, so the edge length of this cell is equal to two atomic radii, or one atomic diameter.