A monoclinic mineral, (Mg,Mn)3 Zn2 (AsO4 )(OH,O) (sub
6) ; associated with manganese silicates at Franklin, NJ.
See:basic front
See:amesite
See:leonite
See:phlogopite
Chiefly magnesite, dolomite, and brucite.
A magnesian variety of allanite.
MgTiO3 . Used in ceramic dielectric bodies. Although relatively low
in dielectric constant, it has a positive temperature coefficient of
capacity. Thus, it can be used in conjunction with a negative coefficient
material; e.g., titania, to produce a near 0 temperature coefficient
product. Lee
MgZrO; melting point, 2,150 degrees C. This compound is sometimes added in
small amounts (up to 5%) to other electroceramic bodies to lower their
dielectric constant at the Curie point. Dodd
Of or pertaining to a mineral, object, area, or locale possessing the
properties of a magnet. Long
Alnico is an alloy of aluminum, nickel, and cobalt, with strong magnetic
properties similar in all directions. Alcomax is anisotropic, with maximum
flux along preferred axis. Hycomax is also anisotropic. Platinax, a
cobalt-platinum alloy containing 23.3% cobalt, is isotropic.
Pryor, 3
Variation of the measured magnetic pattern from a theoretical or
empirically smoothed magnetic field. Hy
The azimuth measured clockwise from magnetic north through 360 degrees ;
the angle at the point of observation between the vertical plane through
the observed object and the vertical plane in which a freely suspended
magnetized needle, influenced by no transient artificial magnetic
disturbance, will come to rest. AGI
The bearing expressed as a horizontal angle between the local magnetic
meridian and a line on the Earth; a bearing measured clockwise from
magnetic north. It differs from a true bearing by the amount of magnetic
declination at the point of observation. AGI
See:bort
A magnetic field used to confine a plasma in controlled-fusion
experiments. Lyman
The closed path taken by the magnetic flux in an electric machine or other
piece of apparatus. CTD
One in which connection between drive and driven member is provided by
electromagnetic force. Pryor, 3
The orientation of an underground survey, using the Earth's magnetic
field. BS, 7
The part to be examined is magnetized either by passing a heavy current
through it or by making it the core of a coil through which a heavy
current is passed. Small cracks, or nonmagnetic phases such as inclusions,
cause the magnetic flux to break the surface, thus forming small magnets.
When the part is sprayed with a suspension of iron oxide particles in
paraffin, the particles cling to the small magnets and thereby reveal
defects. Hammond
In nautical and aeronautical navigation, the continually changing acute
angle between the direction of the magnetic and geographic meridians. The
term "magnetic variation" is preferred. AGI