441 kr
Beställningsvara. Skickas inom 10-15 vardagar. Fri frakt över 249 kr.
Fler format och utgåvor
Beskrivning
Do you know silica, the tetrahedra of silicon and oxygen constituting the crystals of New Agers and the desiccant in a box of new shoes? As quartz crystals, silica is impressively electric and ubiquitous in modern technology (think sonar, radios, telephones, ultrasound, and cheap but precise watches).