
1) Inorganic pigment 2) Lead mineral 3) Oxide 4) Red lead
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https://www.crosswordclues.com/clue/minium

1) Red lead
Found on
https://www.crosswordclues.com/clue/minium

Minium is a genus of thalloid alga comprising approximately 1 species. The thalli take a crustose form. == Species == The only species currently recognised is M. parvum. ...
Found on
http://en.wikipedia.org/wiki/Minium
[mineral] Minium is the naturally occurring form of lead tetroxide, Pb2+2Pb4+O4 also known as red lead. Minium is a light-to-vivid red and may have brown-to-yellow tints. It typically occurs in scaly-to-earthy masses. It crystallizes in the tetragonal crystal system. Minium is rare and occurs in lead-mineral deposits that have been subjecte...
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http://en.wikipedia.org/wiki/Minium_(mineral)
[pigment] `Minium, also known as red lead, is a bright orange red pigment that was widely used in the Middle Ages for the decoration of manuscripts and for painting. It was made by roasting white lead pigment in the air; the white lead would gradually turn yellow, then into an orange lead tetroxide. The color varied depending upon how long ...
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http://en.wikipedia.org/wiki/Minium_(pigment)

vermilion; red lead
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http://phrontistery.info/m.html

• (n.) A heavy, brilliant red pigment, consisting of an oxide of lead, Pb3O4, obtained by exposing lead or massicot to a gentle and continued heat in the air. It is used as a cement, as a paint, and in the manufacture of flint glass. Called also red lead.
Found on
http://thinkexist.com/dictionary/meaning/minium/

(from the article `lead processing`) Red lead, or lead tetroxide (Pb3O4), is another lead oxide whose two most important uses are in paints and as an addition to litharge in storage ... Other dyestuffs are of only minor importance compared with these inks, which are primarily used for pen drawings. Minium (red lead) was used in the ... ...
Found on
http://www.britannica.com/eb/a-z/m/96

<chemistry> A heavy, brilliant red pigment, consisting of an oxide of lead, Pb3O4, obtained by exposing lead or massicot to a gentle and continued heat in the air. It is used as a cement, as a paint, and in the manufacture of flint glass. ... Synonym: red lead. ... Origin: L. Minium, an Iberian word, the Romans getting all their cinnabar from...
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http://www.encyclo.co.uk/local/20973
Min'i·um noun [ Latin
minium , an Iberian word, the Romans getting all their cinnabar from Spain; confer Basque
armineá .]
(Chemistry) A heavy, brilliant red pigment, consisting of an oxide of lead, Pb
3 O
4 , obtained by exposing lead or massicot to a gentle ...
Found on
http://www.encyclo.co.uk/webster/M/70

Minium is the red oxide of lead, often designated red lead, and formerly commonly used as a pigment for ordinary purposes.
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http://www.probertencyclopaedia.com/browse/HM.HTM

Lead oxide, red
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http://www.translationdirectory.com/glossaries/glossary075.htm

Red lead. The name in early times was applied by the Romans to their native vermilion and cinnibar; it was not applied to red lead until the Middle Ages. The word miniature is derived from miniate, meaning to paint with minium. Obsolete as a pigment for the artist today, its chief use is as a primer for steel work.
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http://www.visual-arts-cork.com/colour-art-glossary.htm
(Lead Oxide) Minium, which has been known as `
red lead `, is an oxidation product of other lead minerals. It forms in extreme oxidizing conditions of lead ore bodies and its presence is very indicative of the degree of oxidation. Something of interest to petrologists (rock scientists). It is probably more com...
Found on
https://www.encyclo.co.uk/local/23719
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