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R. Meyer J. Köhler A. Homburg Explosives

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65 Coyote Blasting<br />

Copper chromite is the reaction product of copper oxide and chromium<br />

oxide. It is an important catalyst for the burning of rocket propellants<br />

and pyrotechnical compositions.<br />

Specifications<br />

Cordite<br />

sieve analysis:<br />

through mesh width 0.07 mm: at least 98%<br />

through mesh width 0.04 mm: at least 90%<br />

net content<br />

CuO: at least 79%<br />

not more than 85%<br />

Cr2O3: at least 13%<br />

not more than 19%<br />

Fe2O3: not more than 0.35%<br />

water-soluble matter: not more than 0.5%<br />

Designation for double base (nitroglycerine-nitrocellulose) gun propellants<br />

in the United Kingdom.<br />

Coruscatives<br />

This is the name given by the American worker Zwicky to pairs of<br />

materials (other than the well-known thermites, W delay compositions)<br />

which react with each other without formation of gas.<br />

The exothermal nature of certain components may be surprisingly<br />

high; the mixture Ti:Sb:Pb = 48:23:29 is primed at 570 °C (1060°F),<br />

and the reaction temperature attains 1000 °C (1830°F). Other combinations<br />

include magnesium-silicon, magnesium-tellurium, magnesium-tin<br />

and magnesium-phosphorus.<br />

Coyote Blasting<br />

Kammerminensprengungen; sautage par grands fourneaux de mines<br />

In coyote blasting, which is practiced in open-pit mining and in stone<br />

quarries, tunnels are driven into the mined face and chambers are<br />

drilled which can accommodate large quantities (up to several tons) of<br />

explosives. The chambers – usually several chambers at once – are<br />

charged, stemmed and detonated. They must be primed with the aid<br />

of a W Detonating Cord.

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