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Inverse spinel structures have a different cation distribution in that all of the A cations and half of the B cations occupy octahedral sites, while the other half of the B cations occupy tetrahedral sites. An example of an inverse spinel is Fe 3 O 4, if the Fe 2+ (A 2+) ions are d 6 high-spin and the Fe 3+ (B 3+) ions are d 5 high-spin.
Filipstadite is a very rare mineral [4] of the spinel group, with the formula (Mn,Mg)(Sb 5+ 0.5 Fe 3 + 0.5)O 4. [5] It is isometric, [3] although it was previously thought to be orthorhombic. When compared to a typical spinel, both the octahedral and tetrahedral sites are split due to cation ordering. [3] Filipstadite is chemically close to ...
In this diagram, the red team is executing a neutral zone trap resulting in the blue team dumping the puck in. The neutral zone trap (often referred to as simply the trap) is a defensive strategy used in ice hockey to prevent an opposing team from proceeding through the neutral zone (the area between the blue lines) and to force turnovers.
The superstitious practice of a hockey player not shaving off his facial hair during the playoffs, consequently growing a beard. plus-minus A hockey statistic that can apply to a player or an offensive or defensive line indicating whether they were on the ice when the opposing team scored (a minus) or on the ice when their team scored (a plus).
In ice hockey, a line is a group of forwards who play in a group, or "shift", during a game. A complete forward line consists of a left wing , a centre , and a right wing , while a pair of defencemen who play together are called "partners".
The point's responsibilities include attempting to keep the puck in the offensive zone when the defensive team attempts to clear (see also Offside (ice hockey)), receiving a pass from the forwards to allow the play to reset, and taking slapshots at the goal, hoping to score, create a rebound or a deflection. On the power play, one of the ...
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Hercynite is a spinel of regular symmetry and normal cation distribution, but some disorder occurs in its structure. It consists of ferrous (Fe 2+) ions and aluminium ions (Al 3+); however some ferric ions (Fe 3+) may be located in the structure of hercynite. [5] Melting point of this mineral is inbetween 1,692–1,767 °C (3,078–3,213 °F). [6]