Възможно е да се променя топлинния капацитет, на прима виста не откривам никакви данни, освен в руската вики:

до 769 °C существует α-Fe (феррит) с объёмноцентрированной кубической решёткой в температурном интервале 769—917 °C существует β-Fe, который отличается от α-Fe только параметрами кристаллической решётки и магнитными свойствами


А ето какво пише в английската:

Iron represents perhaps the best-known example of allotropy in a metal. There are three allotropic forms of iron, known as α, γ and δ.

As molten iron cools down it crystallizes at 1538 °C into its δ allotrope, which has a body-centred cubic (bcc) crystal structure. As it cools further its crystal structure changes to face-centred cubic (fcc) at 1394 °C, when it is known as γ-iron, or austenite. At 912 °C the crystal structure again becomes bcc as α-iron, or ferrite, is formed, and at 770 °C (the Curie point, Tc) the iron becomes magnetic. As the iron passes through the Curie temperature there is no change in crystalline structure, but there is a change in "domain structure", where each domain contains iron atoms with a particular electronic spin. In unmagnetized iron, all the electronic spins of the atoms within one domain are in the same direction; however, in neighbouring domains they point in various directions and thus cancel out. In magnetized iron, the electronic spins of all the domains are all aligned, so that the magnetic effects of neighbouring domains reinforce each other. Although each domain contains billions of atoms, they are very small, about 10 microns across.



Няма промяна в кристалната решетка при преминаване през Тк.

Редактирано от пopyчиkPжeвckий на 21.07.09 18:31.