Arsenopyrite - Revision history

Cornish semiconductor at 10:13, 1 July 2026

2026-07-01T10:13:55Z

← Older revision		Revision as of 10:13, 1 July 2026
Line 12:		Line 12:
	* Fracture:Irregular/Uneven		* Fracture:Irregular/Uneven

	[https://www.mindat.org~~/min-3314.html~~ Data from mindat]		[https://www.mindat.org Data from mindat.org]

	Arsenopyrite is the most common form of arsenic in Cornwall, and is extremely common on the mine waste dumps. Part of the reason may be that it seems to degrade much more slowly than either [[pyrite]] or [[chalcopyrite]]. Easily recognised by it's diamond shaped cross sections, it can also form long 'acicular' crystals.		Arsenopyrite is the most common form of arsenic in Cornwall, and is extremely common on the mine waste dumps. Part of the reason may be that it seems to degrade much more slowly than either [[pyrite]] or [[chalcopyrite]]. Easily recognised by it's diamond shaped cross sections, it can also form long 'acicular' crystals.

Cornish semiconductor at 08:29, 1 July 2026

2026-07-01T08:29:15Z

← Older revision		Revision as of 08:29, 1 July 2026
Line 14:		Line 14:
	[https://www.mindat.org/min-3314.html Data from mindat]		[https://www.mindat.org/min-3314.html Data from mindat]

	Arsenopyrite is the most common form of arsenic in Cornwall, and is extremely common on the mine waste dumps. Part of the reason may be that it seems to degrade ~~mush~~ more slowly than either [[pyrite]] or [[chalcopyrite]]. Easily recognised by it's diamond shaped cross sections, it can also form long 'acicular' crystals.		Arsenopyrite is the most common form of arsenic in Cornwall, and is extremely common on the mine waste dumps. Part of the reason may be that it seems to degrade much more slowly than either [[pyrite]] or [[chalcopyrite]]. Easily recognised by it's diamond shaped cross sections, it can also form long 'acicular' crystals.

	As a semiconductor it is similar to pyrite, can be reluctant to semiconduct, and with an overall higher resistance and fairly leaky. It doesn't seem to differ much across different mines or areas of Cornwall. Some [[negative resistance]] has been observed, but this needs more investigation. Can be prone to added capacitance, this is shown in the curve plot being 'artificially' low on the left hand side, as the saw tooth wave resets at the start of the cycle.		As a semiconductor it is similar to pyrite, can be reluctant to semiconduct, and with an overall higher resistance and fairly leaky. It doesn't seem to differ much across different mines or areas of Cornwall. Some [[negative resistance]] has been observed, but this needs more investigation. Can be prone to added capacitance, this is shown in the curve plot being 'artificially' low on the left hand side, as the saw tooth wave resets at the start of the cycle.

Cornish semiconductor at 08:28, 1 July 2026

2026-07-01T08:28:59Z

← Older revision		Revision as of 08:28, 1 July 2026
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			[[File:Arsenopyrite.jpg\|thumb\|right\|frame\|Arsenopyrite from Carharrack Mine, Gwennap]]
	[[File:Arsenopyrite-penlee.png\|right\|frame\|A curve trace of arsenopyrite from Penlee beach]]		[[File:Arsenopyrite-penlee.png\|right\|frame\|A curve trace of arsenopyrite from Penlee beach]]

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	Arsenopyrite is the most common form of arsenic in Cornwall, and is extremely common on the mine waste dumps. Part of the reason may be that it seems to degrade mush more slowly than either [[pyrite]] or [[chalcopyrite]]. Easily recognised by it's diamond shaped cross sections, it can also form long 'acicular' crystals.		Arsenopyrite is the most common form of arsenic in Cornwall, and is extremely common on the mine waste dumps. Part of the reason may be that it seems to degrade mush more slowly than either [[pyrite]] or [[chalcopyrite]]. Easily recognised by it's diamond shaped cross sections, it can also form long 'acicular' crystals.

	As a semiconductor it is similar to pyrite, ~~but~~ with an overall ~~much lower~~ resistance. It doesn't seem to differ much across different mines or areas of Cornwall. Some [[negative resistance]] has been observed, but this needs more investigation.		As a semiconductor it is similar to pyrite, can be reluctant to semiconduct, and with an overall higher resistance and fairly leaky. It doesn't seem to differ much across different mines or areas of Cornwall. Some [[negative resistance]] has been observed, but this needs more investigation. Can be prone to added capacitance, this is shown in the curve plot being 'artificially' low on the left hand side, as the saw tooth wave resets at the start of the cycle.

	===Pages ~~linking here~~===		===Pages mentioning arsenopyrite===

	{{Special:WhatLinksHere/Arsenopyrite}}		{{Special:WhatLinksHere/Arsenopyrite}}

Cornish semiconductor at 19:56, 27 June 2026

2026-06-27T19:56:00Z

← Older revision		Revision as of 19:56, 27 June 2026
Line 1:		Line 1:
	[[File:Arsenopyrite-penlee.png\|right\|frame\|A curve trace of arsenopyrite from Penlee beach]]		[[File:Arsenopyrite-penlee.png\|right\|frame\|A curve trace of arsenopyrite from Penlee beach]]

	Lustre:Metallic, Sub-Metallic		* Lustre:Metallic, Sub-Metallic
	Transparency:Opaque		* Transparency:Opaque
	Colour:Silver-white to steel-gray, may have a slight yellow appearance		* Colour:Silver-white to steel-gray, may have a slight yellow appearance
	Comment:Tarnished material common, some iridescent		* Comment:Tarnished material common, some iridescent
	Streak:Gray-black		* Streak:Gray-black
	Hardness:5½ - 6 on Mohs scale		* Hardness:5½ - 6 on Mohs scale
	Tenacity:Brittle		* Tenacity:Brittle
	Cleavage:Distinct/Good Distinct on {001}; {010} in traces		* Cleavage:Distinct/Good Distinct on {001}; {010} in traces
	Fracture:Irregular/Uneven		* Fracture:Irregular/Uneven

	[https://www.mindat.org/min-3314.html Data from mindat]		[https://www.mindat.org/min-3314.html Data from mindat]

Cornish semiconductor: Created page with "A curve trace of arsenopyrite from Penlee beach Lustre:Metallic, Sub-Metallic Transparency:Opaque Colour:Silver-white to steel-gray, may have a slight yellow appearance Comment:Tarnished material common, some iridescent Streak:Gray-black Hardness:5½ - 6 on Mohs scale Tenacity:Brittle Cleavage:Distinct/Good Distinct on {001}; {010} in traces Fracture:Irregular/Uneven [https://www.mindat.org/min-3314.html Data from mindat] A..."

2026-06-27T19:55:35Z

Created page with "right|frame|A curve trace of arsenopyrite from Penlee beach Lustre:Metallic, Sub-Metallic Transparency:Opaque Colour:Silver-white to steel-gray, may have a slight yellow appearance Comment:Tarnished material common, some iridescent Streak:Gray-black Hardness:5½ - 6 on Mohs scale Tenacity:Brittle Cleavage:Distinct/Good Distinct on {001}; {010} in traces Fracture:Irregular/Uneven [https://www.mindat.org/min-3314.html Data from mindat] A..."

New page

[[File:Arsenopyrite-penlee.png|right|frame|A curve trace of arsenopyrite from Penlee beach]]

Lustre:Metallic, Sub-Metallic
Transparency:Opaque
Colour:Silver-white to steel-gray, may have a slight yellow appearance
Comment:Tarnished material common, some iridescent
Streak:Gray-black
Hardness:5½ - 6 on Mohs scale
Tenacity:Brittle
Cleavage:Distinct/Good Distinct on {001}; {010} in traces
Fracture:Irregular/Uneven

[https://www.mindat.org/min-3314.html Data from mindat]

Arsenopyrite is the most common form of arsenic in Cornwall, and is extremely common on the mine waste dumps. Part of the reason may be that it seems to degrade mush more slowly than either [[pyrite]] or [[chalcopyrite]]. Easily recognised by it's diamond shaped cross sections, it can also form long 'acicular' crystals.

As a semiconductor it is similar to pyrite, but with an overall much lower resistance. It doesn't seem to differ much across different mines or areas of Cornwall. Some [[negative resistance]] has been observed, but this needs more investigation.

===Pages linking here===

{{Special:WhatLinksHere/Arsenopyrite}}