Do ice cubes freeze from the center outward?

Answer 1

Generally no, unless you have something that is causing a decrease of temperature from the center... of which I can't think of any circumstances where that happens... The reason for this is that in order for an ice cube to freeze it needs to drop in temperature, the outside gets colder first and thus freezes first.

Answer 2

Amorphous ice is an ice lacking crystal structure. Amorphous ice exists in three forms: low-density (LDA) formed at atmospheric pressure, or below, high density (HDA) and very high density amorphous ice (VHDA), forming at higher pressures. LDA forms by extremely quick cooling of liquid water ("hyperquenched glassy water", HGW), by depositing water vapour on very cold substrates ("amorphous solid water", ASW) or by heating high density forms of ice at ambient pressure ("LDA"). Ice Ih Normal hexagonal crystalline ice. Virtually all ice in the biosphere is ice Ih, with the exception only of a small amount of ice Ic. Ice Ic A Metastable cubic crystalline variant of ice. The oxygen atoms are arranged in a diamond structure. It is produced at temperatures between 130-150 K, and is stable for up to 200 K, when it transforms into ice Ih. It is occasionally present in the upper atmosphere. Ice II A rhombohedral crystalline form with highly ordered structure. Formed from ice Ih by compressing it at temperature of 190-210 K. When heated, it undergoes transformation to ice III. Ice III A tetragonal crystalline ice, formed by cooling water down to 250 K at 300 MPa. Least dense of the high-pressure phases. Denser than water. Ice IV A Metastable rhombohedral phase. Doesn't easily form without a nucleating agent. Ice V A monoclinic crystalline phase. Formed by cooling water to 253 K at 500 MPa. Most complicated structure of all the phases. Ice VI A tetragonal crystalline phase. Formed by cooling water to 270 K at 1.1 GPa. Exhibits Debye relaxation. Ice VII A cubic phase. The hydrogen atoms positions are disordered; the material shows Debye relaxation. The hydrogen bonds form two interpenetrating lattices. Ice VIII A more ordered version of ice VII, where the hydrogen atoms assume fixed positions. Formed from ice VII, by cooling it below 5 °C. Ice IX A tetragonal metastable phase. Formed gradually from ice III by cooling it from 208 K to 165 K, stable below 140 K and pressures between 200 and 400 MPa. It has density of 1.16 g/cm³, slightly higher than ordinary ice. Ice X Proton-ordered symmetric ice. Forms at about 70 GPa. Ice XI An orthorhombic low-temperature equilibrium form of hexagonal ice. It is ferroelectric. Ice XII A tetragonal metastable dense crystalline phase. It is observed in the phase space of ice V and ice VI. It can be prepared by heating high-density amorphous ice from 77 K to about 183 K at 810 MPa. Ice XIII A monoclinic crystalline phase. Formed by cooling water to below 130 K at 500 MPa. The proton-ordered form of ice V. Ice XIV An orthorhombic crystalline phase. Formed below 118 K at 1.2 GPa. The proton-ordered form of ice XII. Ice XV The predicted, but not yet proven, proton-ordered form of ice VI. Thought to be formed by cooling water to around 108-80 K at 1.1 GPa.