Of, or pertaining to, smoothly rounded masses resembling breasts or
portions of spheres; descriptive of the shape of some mineral aggregates,
such as malachite or limonite; similar to but a larger size than
botryoidal. Fay
See:pillow structure
Said of a mineral displaying large spheroidal surfaces, e.g., malachite.
Nelson
Coordination of functional units and presentation of the results of their
achievements in policy-guiding form as facts, conclusions, and
recommendations. Efficient integration of the operations managed.
Pryor, 3
An orthorhombic mineral, Li2 Al4 (Si2 AlB)O10
(OH)8 ; kaolinite-serpentine group.
a. A hexagonal mineral, Mg6 Al2 (CO3 )(OH)16
.4H2 O ; dimorphous with hydrotalcite.
b. The mineral group barbertonite, chlormagaluminite, manasseite, and
sjoegrenite.
a. Spotted ore, Spain.
b. A commercial grade of mica which is stained to very slightly spotted,
Brazil.
See:soapstone
See:amygdaloid
a. A miner's pick. Webster 3rd
b. A usually tapered or cylindrical axle spindle, or arbor that is
inserted into a hole in a piece of work so as to support the work during
machining. Webster 3rd
c. A metal bar that serves as a core around which metal or other material
may be cast, molded, forged, bent, or otherwise shaped.
Webster 3rd
d. Any of a train of jointed units intended to be pulled through an
underground duct as each joint is made to ensure perfect alinement, or
through a steel pipe in process of welding to ensure a smooth interior.
Webster 3rd
e. The shaft and bearings on which a tool (as a grinding disk or circular
saw) is mounted. Webster 3rd
f. A temporary interior support for a thin-walled tube (as a tubular steel
pile to be filled later with concrete) being driven into something.
Webster 3rd
A miner's pick. Nelson
A type of twinning in the monoclinic crystal system. The basal pinacoid is
the twinning plane. Hess
A monoclinic crystal twinned across the basal pinacoid, according to the
Manebach law, e.g., orthoclase.
See:man machine
A variety of andalusite containing 6.91% Mn2 O3 . It differs
from ordinary andalusite in its grass-green color and strong pleochroism.
From Vestana, Sweden. English
An isometric mineral, (Ca,Na)3 (Mn,Mg)2 (AsO4 ) (sub
3) ; forms a series with berzeliite and is yellow to orange.
See:alabandite
Variety of andalusite containing manganese. Alternate spelling of
manganandalusite.
See:piemontite
A gray-white, hard, brittle metallic element. Symbol, Mn. Manganese does
not occur uncombined in nature, but its minerals are widely distributed.
Pyrolusite (MnO2 ) and rhodochrosite (MnCO3 ) are the most
common minerals. The discovery of large quantities of manganese nodules on
the ocean floor, containing about 24% manganese, holds promise as a source
of manganese. Used to form many important alloys, esp. with steel,
aluminum, and antimony; used in dry cells and glass, and in the
preparation of oxygen, chlorine, and medicines.
Handbook of Chemistry and Physics, 3
See:spessartine