Reddish-brown or reddish zone in permeable near-surface material that is
produced under conditions of free subsurface drainage by the deposition of
secondary iron oxide.
Of, pertaining to, or containing iron in the trivalent state; e.g., ferric
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl
chloride, FeCl (sub 3' . Standard, 2
A high, iron blast furnace, in the upper part of which crude bituminous
coal is converted into coke. Fay
A triclinic mineral, Fe5 (SO4 )6 (OH)2 .20H
2 O ; copiapite group.
a. A conglomerate consisting of surficial sand and gravel cemented into a
hard mass by iron oxide derived from the oxidation of percolating
solutions of iron salts. AGI
b. A ferruginous duricrust. Etymol. "ferr"uginous + con"crete."
CF:calcrete; silcrete. AGI
a. A general term for an indurated soil horizon cemented with iron oxide,
mainly hematite. AGI
b. The hard crust of an iron concretion. AGI
A member of a group of elements that are similar chemically to iron. The
group includes chromium, cobalt, manganese, nickel, titanium, vanadium,
and other elements.
Monoclinic and orthorhombic minerals, (Na,K)2 Mg(Si,Al)18 O
36 (OH).9H2 O , of the zeolite group; transparent to
translucent, vitreous to pearly; in spherical aggregates of thin,
blade-shaped crystals at Kamloops Lake, BC, Canada and Leavitt Lake, CA.
See:laihunite
Containing iron. Syn:ferruginous
a. Unbalanced orientation of magnetic moments. Intermediate between
ferromagnetism and antiferromagnetism. Van Vlack
b. Strong magnetic susceptibility caused by the overlap of adjacent d and
p orbitals resulting in an unequal number of electrons aligned with spins
antiparallel; e.g., magnetite, pyrrhotite, and maghemite.
CF:antiferromagnetism; diamagnetism; ferromagnetism; paramagnetism;
superexchange.
A possibly orthorhombic mineral, Fe23 (Mo6 O 4 )3 .8H (sub 2) O ; forms yellow earthy powder, incrustation, or
silky, fibrous, and radiating crystals from reaction of pyrite with
molybdenite under supergene conditions; relatively common in porphyry
copper deposits of Southwestern United States in old mine dumps with
jarosite and goethite. Syn:molybdic ocher; iron molybdate; molybdite.
A trigonal mineral, Na3 Fe(SO4 )3 3H2 O ;
vitreous; soft; in the Atacama Desert, northern Chile. Formerly called
ferronatrite.
An orthorhombic mineral, Li(Fe,Mn)PO4 ; forms a series with
sicklerite; an alteration product of weathered triphyllite-lithiophilite
in granite pegmatites, Keystone and Custer districts, Black Hills, SD;
also Varutriisk, Sweden.
An amorphous mineral, Fe3 (AsO4 )2 (OH)3 .5H
2 O ; occurs with erythrite and annabergite at Cobalt, ON, Canada.
a. Native iron, such as the terrestrial iron from Disko Island, Greenland.
English
b. A general term applied to grains, scales, and threads of
unidentifiable, more or less transparent or amorphous, red, brown, or
yellow iron oxide in the groundmass of a porphyritic rock (Johannsen,
1939). CF:opacite
c. A term used by Tieje (1921) for a cemented iron-rich sediment whose
particles do not interlock. AGI
The metasomatic alteration of other minerals into ferrite.
An isometric mineral, (K,Ca,Na)(W6 ,Fe3 )(O,OH)6
.H2 O ; in minute yellow octahedra and platy aggregates; in Uganda,
Rwanda, Zaire, Portugal, France, Washington, and Nevada.
Syn:tungstic ocher
A variety of crystallized turquoise containing 5% Fe2 O3 ;
from Lynchburg, VA. Spencer, 2
A monoclinic mineral, Ca2 (Fe2+ ,Mg)5 Si8 O
22 (OH)2 ; amphibole group; has Mg/(Mg+Fe2+ ) = 0 to
0.5; forms a series with tremolite and actinolite. Formerly called
ferrotremolite.
An alloy of iron and one or more other elements useful for making alloy
additions in steel or ironmaking.