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IRON

Miscellaneous

• Family: None
• Region: None
• Mined At: Unspecified
• Raw Mineral: Yes
• Generic: No

Notes

(Richard Willis)

Element, with the symbol Fe and atomic weight of 55.84
Ferric/ferrous oxide is the most refractory of the three oxides.
The iron oxides are probably the most widely used oxides to color clays and glazes throughout the history of ceramics. Certainly among prehistoric ceramics they were the most used colorants. In oxidizing firings reds, yellows and browns result; in reduction firings blacks, browns, and greys result — all else being equal. Clay and glaze colors, then, can tell the archaeologist, for instance, a great deal about the materials and techniques used in producing antique pottery. see colorants
water solubility & fusion ºC
— oxide (red) — soluble — 1565
— oxide (black) — nsoluble — 1480
commonly used forms
— ferrous oxide (black) FeO
— chromate Fe₂O₃, Cr₂O₃
— ferric oxide (red to yellow) Fe₂O₃
— sulfate FeSO₄, 7H₂O
— ferric/ferrous (red to yellow) Fe₃O₄
— ilmenite FeO, TiO₂
— hydroxide Fe(OH)₃
— picolite (Fe, Mg), (Al, Cr, Fe)₂, O₂
— chlorurium FeCl₃
— franklinite (Zn, Mn), (Fe), (Mn), O₄
— dichromate-ferric Fe₂(Cr₂O₇)₃

Authors

• Richard Willis (Owner)

XML

<?xml version="1.0" encoding="UTF-8"?>
<material name="IRON" descrip="" generic="0" rawmineral="1" searchkey="" loi="0.00">
<notes>
<note>Element, with the symbol Fe and atomic weight of 55.84&lt;BR&gt;
Ferric/ferrous oxide is the most refractory of the three oxides.&lt;BR&gt;
The iron oxides are probably the most widely used oxides to color clays and glazes throughout the history of ceramics. Certainly among prehistoric ceramics they were the most used colorants. In oxidizing firings reds, yellows and browns result; in reduction firings blacks, browns, and greys result &amp;#151; all else being equal. Clay and glaze colors, then, can tell the archaeologist, for instance, a great deal about the materials and techniques used in producing antique pottery. see &lt;B&gt;&lt;I&gt;colorants&lt;BR&gt;
&lt;/I&gt;water solubility &amp;amp; fusion &amp;ordm;C&lt;BR&gt;
&lt;/B&gt;&amp;#151; oxide (red) &amp;#151; soluble &amp;#151; 1565&lt;BR&gt;
&amp;#151; oxide (black) &amp;#151; nsoluble &amp;#151; 1480&lt;BR&gt;
&lt;B&gt;commonly used forms&lt;BR&gt;
&lt;/B&gt;&amp;#151; ferrous oxide (black) FeO&lt;BR&gt;
&amp;#151; chromate Fe&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;O&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;, Cr&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;O&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151; ferric oxide (red to yellow) Fe&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;O&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151; sulfate FeSO&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;, 7H&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;O&lt;BR&gt;
&amp;#151; ferric/ferrous (red to yellow) Fe&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;O&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151; ilmenite FeO, TiO&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151; hydroxide Fe(OH)&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151; picolite (Fe, Mg), (Al, Cr, Fe)&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;, O&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151; chlorurium FeCl&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;SUB&gt;&lt;BR&gt;
&lt;/SUB&gt;&amp;#151; franklinite (Zn, Mn), (Fe), (Mn), O&lt;FONT SIZE=2&gt;&lt;SUB&gt;4&lt;/SUB&gt;&lt;/FONT&gt;&lt;BR&gt;
&amp;#151; dichromate-ferric Fe&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;(Cr&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;O&lt;FONT SIZE=2&gt;&lt;SUB&gt;7&lt;/SUB&gt;&lt;/FONT&gt;)&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;BR&gt;

</note>
</notes>
</material>

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