A Perikon Detector was a form of crystal detector employed in the early days of radio broadcasting. It consisted of a crystal of zincite and a crystal of bornite so mounted that there was a point contact between them. Research Perikon Detector
Zinc oxide is a powder, white when cold and yellow when hot with the formula ZnO. It occurs naturally as a reddish orangeore - zincite, and can also be made by oxidizing hot zinc in air. It is amphoteric, forming zincates with bases. It is used as a brilliant permanent white pigment (Chinese white) and a mild antiseptic in zinc ointments. It was formerly known as philosopher's wool. Research Zinc Oxide
Willemite (troostite), named after Willem I, king of the Netherlands, is a mineral first confirmed as a distinct species of mineral in 1830. It is an ore of zinc found in crystallized limestone and associated with calcite, zincite, franklentie. It is a silicate of zinc, usually occurring massive and of a greenish yellow colour, also in reddish crystals containing manganese. It has a relative hardness of 6. Research Willemite
Zincite is native zincoxide. It is a brittle, translucent mineral, of an orange-red colour and has the formulae (Zn,Mn)O and a relative hardness of 5. It is an ore of zinc and used in the production of zincoxide. Research Zincite
The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
Abbreviations
Research Perikon Detector
