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Selenium

Chemistry Se 100.000

Hazards

• Selenium

Miscellaneous

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

Notes

A metal of the sulfur group. It is normally added in its pure form to glass batches as a coloring agent for rose or ruby glass or to act as a decolorizer against green iron.

Selenium is also introduced from sodium selenite (Na2O SeO2) or barium selenite (BaO SeO2).

Note

(Richard Willis)

Element, with the symbol Se and atomic weight of 79
Powerful colorant. Used principally in pigments for reds and oranges. Low-temperature cadmium reds are achieved combining cadmium sulfates with seleniums.
commonly used forms
– selenium oxide SeO₂
– seleniate soda Na₂OSeO₃
– barium selenite BaO, SeO₃

Data

• Melting Point (MP): 217C
• Hardness (Moh): 4.5
• Hardness (Moh): 4.5
• Melting Point (MP): 217C

Authors

• Tony Hansen (Owner)

XML

<?xml version="1.0" encoding="UTF-8"?>
<material name="Selenium" descrip="" generic="0" rawmineral="0" searchkey="" loi="0.00">
<families>
<family name="Colorant"/>
</families>
<oxides>
<oxide symbol="Se" name="Selenium" status="" percent="100.000" tolerance=""/>
</oxides>
<hazards>
<hazard name="Selenium"/>
</hazards>
<notes>
<note>A metal of the sulfur group. It is normally added in its pure form to glass batches as a coloring agent for rose or ruby glass or to act as a decolorizer against green iron.

Selenium is also introduced from sodium selenite (Na2O SeO2) or barium selenite (BaO SeO2).</note>
<note>Element, with the symbol Se and atomic weight of 79&lt;BR&gt;
Powerful colorant. Used principally in pigments for reds and oranges. Low-temperature cadmium reds are achieved combining cadmium sulfates with seleniums.&lt;BR&gt;
&lt;B&gt;commonly used forms&lt;BR&gt;
&lt;/B&gt;&amp;#150; selenium oxide SeO&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;&lt;BR&gt;
&amp;#150; seleniate soda Na&lt;FONT SIZE=2&gt;&lt;SUB&gt;2&lt;/SUB&gt;&lt;/FONT&gt;OSeO&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;BR&gt;
&amp;#150; barium selenite BaO, SeO&lt;FONT SIZE=2&gt;&lt;SUB&gt;3&lt;/SUB&gt;&lt;/FONT&gt;&lt;BR&gt;

</note>
</notes>
<testdata>
<testitem testname="0" value="217C"/>
<testitem testname="0" value="4.5"/>
<testitem testname="0" value="4.5"/>
<testitem testname="0" value="217C"/>
</testdata>
</material>

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