Galena: Difference between revisions
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Created page with "* Lustre:Metallic, Sub-Metallic, Dull * Transparency:Opaque * Colour:Lead-grey * Streak:Lead-grey * Hardness:2½ on Mohs scale * Tenacity:Brittle * Cleavage:Perfect {001} * Parting:{111} * Fracture:Sub-Conchoidal [https://www.mindat.org/min-1641.html Data from mindat.org]] The "OG" semiconducting mineral from the early days of radio, galena was chosen as it was the best material for converting radio frequencies into audible signals, by removin..." |
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* Fracture:Sub-Conchoidal | * Fracture:Sub-Conchoidal | ||
[https://www.mindat.org/min-1641.html Data from mindat.org | [https://www.mindat.org/min-1641.html Data from mindat.org] | ||
The "OG" semiconducting mineral from the [[Semiconductor history|early days of radio]], galena was chosen as it was the best material for converting radio frequencies into audible signals, by removing the lower half of the modulation. Often combined with silver cat's whisker contacts. Silver bearing (argentiferous) galena was said to be the best form. | The "OG" semiconducting mineral from the [[Semiconductor history|early days of radio]], galena was chosen as it was the best material for converting radio frequencies into audible signals, by removing the lower half of the modulation. Often combined with silver cat's whisker contacts. Silver bearing (argentiferous) galena was said to be the best form. | ||
Has a higher overall resistance than the [[pyrite|pyrites]] and seems to gradually lose it's properties as it becomes tarnished. | Has a higher overall resistance than the [[pyrite|pyrites]] and seems to gradually lose it's properties as it becomes tarnished. | ||
Revision as of 14:40, 21 June 2026
- Lustre:Metallic, Sub-Metallic, Dull
- Transparency:Opaque
- Colour:Lead-grey
- Streak:Lead-grey
- Hardness:2½ on Mohs scale
- Tenacity:Brittle
- Cleavage:Perfect {001}
- Parting:{111}
- Fracture:Sub-Conchoidal
The "OG" semiconducting mineral from the early days of radio, galena was chosen as it was the best material for converting radio frequencies into audible signals, by removing the lower half of the modulation. Often combined with silver cat's whisker contacts. Silver bearing (argentiferous) galena was said to be the best form.
Has a higher overall resistance than the pyrites and seems to gradually lose it's properties as it becomes tarnished.