-
temperatures above 950 °C (1,740 °F).
Hematite occurs naturally in
black to
steel or silver-gray,
brown to reddish-
brown, or red colors. It is
mined as an...
- as bog iron ore in
meadows and marshes. In its
brown form, it is
sometimes called brown hematite or
brown iron ore.
Limonite is
relatively dense with a...
-
partially to the more
reddish hematite. It is used for both oil and
water color paint. At a hue of 9, it is
classified as a red-
brown. The
first recorded use...
- then mica, then ming-chu, then realgar, then
brown hematite, then
conglomerate m****es of
brown hematite, then
stone c****ia (?), then quartz, then paraffin...
-
modern equivalent sold as "mummy
brown" is
composed of a
mixture of kaolin, quartz, goethite, and
hematite, with the
hematite and
goethite (generally 60% of...
- 3·nH 2O,
takes its
reddish colour from the
mineral hematite,
which is an iron oxide,
reddish brown when hydrated.
Purple ochre is a rare
variant identical...
-
Deposits of
specular and dark
hematite were
recorded west of Melilla,
within 5–6
kilometres (3.1–3.7 mi) of the sea.
Brown hematite was
noted in the area of...
-
inorganic compound with the
formula Fe2O3. It
occurs in
nature as the
mineral hematite,
which serves as the
primary source of iron for the
steel industry. It...
- over 7,000
acres (2,800 ha) of the
surrounding country. Love
mined brown hematite ore in the
hills northeast of the forge, and
transported the ore to...
-
conversion could penetrate, the pyrite-carbonate was
converted to a
usable brown hematite iron ore
along the
outcrops and near the
bedrock surface. The Marcellus...