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| | Mineral Information Institute - INDIUM (Site not responding. Last check: ) |
 | | Indium has the unusual physical property that when it is bent (that is, when it is stressed) it creates a sound similar in pitch to a scream. |
 | | Indium is retrieved as a by-product of zinc ores, specifically from the mineral sphalerite, where its abundance can be as high as almost 900 parts per million (ppm) or as low as 1 ppm. |
 | | Indium, as indium phosphide, is used to make photovoltaic devices (devices that transform light energy into electricity), semi-conductors, high-speed transistors, specialized solders and metal alloys. |
| www.mii.org /Minerals/photoindium.html (500 words) |
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