the.com/indium

the soft metal that screams when you bend it and runs every touchscreen you stroke.

means Indium is a soft, silvery metallic element (atomic number 49) used in alloys, solders, and—as indium tin oxide—the transparent conductive coating on touchscreens and flat-panel displays.

from Named for the brilliant indigo-blue line it threw in the spectroscope when two German chemists discovered it in the 1860s while examining zinc ore. The color did the naming: 'indium' comes from the Latin 'indicum,' meaning indigo—the same deep blue dye whose name traces back to India, the land it was first imported from. So a flash of blue light, glimpsed through a prism, christened the metal that now lights up the screens you tap.

the cry
Bending a bar emits an audible crackling 'tin cry'
your screen
Indium tin oxide coats nearly every touchscreen alive
so soft
Soft enough to mark with a fingernail
named blue
Named for the indigo line glowing in its spectrum
sticks cold
Cold-welds to glass and metal without heat
for instance

indium tin oxide — transparent conductor in 90% of lcd touchscreens worldwide

indium antimonide — semiconductor in infrared detectors used by military and thermal imaging since 1950s

indium phosphide — compound in high-speed integrated circuits, critical for 5g and fiber optic communications

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