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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.
Maghemite (Fe 2 O 3, γ-Fe 2 O 3) is a member of the family of iron oxides.It has the same formula as hematite, but the same spinel ferrite structure as magnetite (Fe 3 O 4) and is also ferrimagnetic.
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.
Also trapper or catching glove. The webbed glove that the goaltender wears on the hand opposite the hand that holds the stick. centre Also center. A forward position whose primary zone of play is the middle of the ice. change on the fly Substituting a player from the bench during live play, i.e. not during a stoppage prior to a faceoff. charging The act of taking more than three strides or ...
In ice hockey, players are substituted "on the fly," meaning a substitution can occur even in the middle of play as long as proper protocol is followed (under typical ice hockey rules, the substituting player cannot enter the ice until the substituted player is within a short distance of the bench and not actively playing the puck ...
Defence or defense (in American English) in ice hockey is a player position that is primarily responsible for preventing the opposing team from scoring. They are often referred to as defencemen , D , D-men or blueliners (the latter a reference to the blue line in ice hockey which represents the boundary of the offensive zone; defencemen ...
From the start of the exhibition matches, he conducted the team through skating wind sprints consisting of end line to blue line and back, then end line to red line and back, then end line to far blue line and back, and finally end line all the way down and back. Some of the players took to calling these "Herbies". [24]
Teams were allowed a forward pass in any of the zones, but the puck must be carried over a blue line by a skater. [10] Frank Boucher and Cecil Duncan introduced the centre red line in the 1943–44 season, in an effort to open up the game by reducing the number of offside infractions and create excitement with quicker counter-attacks. [ 11 ]