https://cornish-semiconductor.com/index.php?action=history&feed=atom&title=Chalcocite 2026-06-28T04:43:30Z Revision history for this page on the wiki MediaWiki 1.43.6 https://cornish-semiconductor.com/index.php?title=Chalcocite&diff=397&oldid=prev 2026-06-27T19:45:46Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 19:45, 27 June 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l18">Line 18:</td> <td colspan="2" class="diff-lineno">Line 18:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Due to these interesting characteristics, it tends to be a favourite of mine.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Due to these interesting characteristics, it tends to be a favourite of mine.</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">===Pages linking here===</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">{{Special:WhatLinksHere/Chalcocite}}</ins></div></td></tr> </table>

Cornish semiconductor https://cornish-semiconductor.com/index.php?title=Chalcocite&diff=391&oldid=prev 2026-06-27T19:36:47Z

<p>Created page with &quot;<a href="/index.php/File:Chalcocite-penstruthal.png" title="File:Chalcocite-penstruthal.png">right|frame|A curve trace of calcocite from Penstruthal mine</a> * Lustre:Metallic, Sub-Metallic * Transparency:Opaque * Colour:Blue black, gray, black, black gray, or steel gray * Streak:Blackish lead gray * Hardness:2½ - 3 on Mohs scale * Tenacity:Brittle * Cleavage:Poor/Indistinct Indistinct on (110) * Fracture:Conchoidal * Comment:Somewhat sectile [https://www.mindat.org/min-955.html Data from mindat.org] Chalcocite is also called...&quot;</p> <p><b>New page</b></p><div>[[File:Chalcocite-penstruthal.png|right|frame|A curve trace of calcocite from Penstruthal mine]]<br /> <br /> * Lustre:Metallic, Sub-Metallic<br /> * Transparency:Opaque<br /> * Colour:Blue black, gray, black, black gray, or steel gray<br /> * Streak:Blackish lead gray<br /> * Hardness:2½ - 3 on Mohs scale<br /> * Tenacity:Brittle<br /> * Cleavage:Poor/Indistinct Indistinct on (110)<br /> * Fracture:Conchoidal<br /> * Comment:Somewhat sectile<br /> <br /> [https://www.mindat.org/min-955.html Data from mindat.org]<br /> <br /> Chalcocite is also called &quot;grey copper&quot;, and is an important ore of copper. It&#039;s fairly common, but tends to be more common as isolated crystals. Thick veins can be found, usually in a dense and &#039;massive&#039; (finely crystallised) nature. It can look a bit like weathered sphalerite, but tends to be associated with green crusts of malachite and blue crysocolla.<br /> <br /> It has a similarly low overall resistance as chalcopyrite - but it tends to have a very sudden and distinct point at which it starts conducting (around +1.3V), and when it does, it can carry large currents. Interestingly it can display properties of a [https://en.wikipedia.org/wiki/Shockley_diode Shockley diode], in that once &#039;switched on&#039; it will remain in a conducting state until a much lower threshold (near to 0V) is reached. <br /> <br /> Due to these interesting characteristics, it tends to be a favourite of mine.</div>

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