See:capel
A carbide of iron, Fe23 C6 , in which all or part of the
iron may be replaced by chromium, molybdenum, and/or tungsten,
(Fe,Cr,Mo,W)23 C6 . Osborne
Term used in the Malay States for the pay streaks of cassiterite.
Lewis
One-twenty-fourth part. It is used to designate the fineness of gold;
thus, 18-karat gold is 18/24 (or 75%) pure gold and 6/24 (or 25%) other
alloying metal or metals. Not to be confused with carat.
A trigonal mineral, V2 O3 ; hematite group; black; in
boulders from the Outokumpu orebody in the Karelian schist belt, Finland.
See:Carlsbad twin
A possibly hexagonal mineral, (Ce,La,Th)(Ti,Nb)(Al,Fe)(Si,P)2 O
7 (OH)4 .3H2 O(?) ; metamict; at Mt. Karnasurt, Kola
Peninsula, Russia.
A monoclinic mineral (coronene), C24 H12 . Also spelled
carpathite. Syn:pendletonite
A possibly monoclinic mineral, (Mg,Ni)2 Si2 O5 (OH)
2 (?) ; greenish blue; with talc in serpentinite from the Ural
Mountains, Russia. (Not karpinskyite.)
A mixture of leifite and a zinc-bearing smectite. (Not karpinskite.)
A type of topography that is formed on limestone, gypsum, and other rocks
by dissolution, and that is characterized by sinkholes, caves, and
underground drainage. Etymol. German, from the Yugoslavian territory Krs;
type locality, a limestone plateau in the Dinaric Alps of northwestern
Yugoslavia and northeastern Italy. First published on a topographic map,
Ducatus Carnioliae, in 1774. Adj. karstic. Syn:karst topography
AGI
See:karst
A potassian variety of celsian.
A monoclinic mineral, Pb(UO2 )SiO4 .H2 O ;
radioactive; an oxidation product of uraninite; at Kasolo, Katanga, Zaire.
Formerly called droogmansite.
A small, circular shaft furnace with three or four tuyeres, for lead
smelting. Fay
See:cata-
See:cataclastic
A measure of the cooling effect of the ambient air as determined by the
kata thermometer. This instrument may be used wet or dry. BS, 8
Destructive metamorphism in the katamorphic zone, at or near the Earth's
surface, in which complex minerals are broken down and altered through
oxidation, hydration, solution, and allied processes to produce simpler
and less dense minerals. The term was introduced by Van Hise in 1904. Also
spelled catamorphism. CF:anamorphism
A type of alcohol thermometer used to determine the cooling power of the
ambient air and sometimes to measure low air velocities. BS, 8
According to Grubenmann's classification of metamorphic rocks (1904), the
lowermost depth zone of metamorphism, which is characterized by high
temperatures (500 to 700 degrees C), mostly strong hydrostatic pressure,
and low or no shearing stress. It produces rocks such as high-grade
schists and gneisses, granulites, eclogites, and amphibolites. The concept
includes effects of high-temperature contact metamorphism and
metasomatism. Modern usage stresses temperature-pressure conditions
(highest metamorphic grade) rather than the likely depth of zone. Also
spelled catazone. CF:mesozone; epizone. See also:katamorphism
AGI