Search Results for: Optical elements any material
with its chemical symbol and atomic number (for metals, precious metals, non-metals, and rare earth elements), or chemical composition (for compounds), a description, a list of uses, import sources to the us, world resources, and any available substitutes. the appendix is subdivided into compounds,
metals, non-metals, and rare earth elements; these can be accessed by clicking on c, m, n, or r respectively. the terms element, mineral, noble metal, ore, and compound appear under various materials entries. an element is a fundamental substance that cannot be broken down chemically and consists of...
https://www.cia.gov/library/publications/the-world-factbook/appendix/appendix-h.html