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mellilite

See:melilite

mellite

A tetragonal mineral, Al2 [C6 (COO)6 ].16H2 O;
resinous; honey yellow; forms nodules in brown coal. Also spelled
melinite, mellilite. (Not melite.) Syn:honey stone

mellorite

A silicate of ferric iron, calcium, etc., approaching garnet in
composition, but with optical properties similar to those of an
orthorhombic pyroxene. Formed by the action of basic slag on silica brick
in a steel furnace. Spencer, 2; AGI

mellow amber

See:gedanite

melonite

a. A trigonal mineral, NiTe2 ; forms a series with merenskyite;
one perfect cleavage; metallic reddish white; soft; sp gr, 7.3.
b. The mineral group berndtite, kitkaite, melonite, merenskyite, and
moncheite. Syn:tellurnickel

melteigite

A dark-colored plutonic rock that is part of the ijolite series and
contains nepheline and 60% to 90% mafic minerals, esp. green pyroxene. The
name is from Melteig farm, Fen complex, Norway. AGI

melting hole

The opening in the floor to a furnace in a melting house.
Mersereau, 2

melting house

The building in which crucible furnaces for steel making are located.
Mersereau, 2

melting point

That temperature at which a single, pure solid changes phase to a liquid
or to a liquid plus another solid phase, upon the addition of heat at a
specific pressure. Unless otherwise specified, melting points are usually
stated in terms of 1 kPa. The term can also be used for the isothermal
melting of certain mixtures, such as eutectic mixtures. Erroneously used
also to refer to the temperature at which some appreciable but unspecified
amount of liquid develops in a complex solid mixture that possesses a
melting range; e.g., the melting point of granite. Abbrev.: mp or MP.
AGI

melting pot

A crucible. Standard, 2

melting shop

Open-hearth plant. Newton, 1

melting zone

The hottest part of a furnace, where melting takes place.
Mersereau, 2

member

A division of a formation, generally of distinct lithologic character and
of only local extent.

membrane filter

See:molecular filter sampler

membrane theory

An advanced theory of design for thin shells, based on the premise that a
shell cannot resist bending because it deflects. The only stresses that
exist, therefore, in any section are shear stress and direct compression
or tension. Hammond

menaccanite

a. A variety of ilmenite found as sand at Menaccan, Cornwall, Eng.
b. A black, magnetic sand from Cornwall, England, from which the element,
titanium, was first isolated. Also spelled menachanite; manaccanite;
menachite. Hess

mend

Eng. To load, or reload, trams at the gate ends out of smaller trams used
only in the working faces of thin seams.

mendipite

An orthorhombic mineral, Pb3 Cl2 O2 ; white; in the
Mendip Hills, United Kingdom.

mendozite

A monoclinic mineral, NaAl(SO4 )2 .11H2 O .
See also:soda alum

meneghinite

An orthorhombic mineral, Pb13 CuSb7 S24 ; forms
slender prismatic blackish lead-gray crystals.

Menevian

European stage: Middle Cambrian (above Solvan, below Maentwrogian).
AGI