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Beryllium

A metal stiffer than steel at a quarter the density, and toxic enough that machining it requires containment.

Beryllium has an unusual combination: very low density, very high stiffness, and transparency to X-rays. That last property gives it a niche nothing else fills — the windows of X-ray tubes are beryllium because it lets the radiation out while holding vacuum in.

It is also seriously hazardous. Inhaled beryllium dust causes chronic beryllium disease, an irreversible lung condition that can follow a small exposure years earlier. Its industrial use is shaped as much by that risk as by its properties.

Uses

Beryllium is used where nothing else will do, and avoided everywhere else, because its dust is seriously toxic to the lungs.

It is transparent to X-rays, which makes it the window material in X-ray tubes and detectors. Alloyed into copper at a few per cent it produces a spring metal that is hard, conductive and non-sparking — used for tools in explosive atmospheres. Its stiffness-to-weight ratio is exceptional, so it appears in satellite optics and inertial guidance components where mass is costly.

Medium confidence Weak evidence

How we know: checked recently · only one source, so there is nothing to cross-check it against · stated directly by the source.

How this connects

Where a connection has been confirmed by an outside reference, that reference is named beside it.

is used as

  • Alloying — application · copper-beryllium alloys, for non-sparking and spring applications

is extracted from

  • Beryl — mineral · the only commercial source of beryllium Wikidata

is produced by

  • Metallothermic reduction — process · magnesium reducing beryllium fluoride, and the reason beryllium is expensive before anyone accounts for how carefully it has to be handled

is found in

  • Emerald — mineral variety · from the beryl, and the reason the mineral is rare in the first place
  • Aquamarine — mineral variety · from the beryl
  • Morganite — mineral variety · from the beryl
  • Beryl — mineral Wikidata

Sources

  • Material World
    Our own writing
  • Wikidata
    Wikimedia Foundation · Creative Commons CC0 1.0 Universal (public domain dedication)
  • PubChem
    US National Library of Medicine · Mixed — aggregated third-party content, rights retained by depositors
  • NIST — National Institute of Standards and Technology
    United States Department of Commerce · US Government work — public information, credit requested

Questions this page answers

Where it comes from, and what it becomes

Follow Beryllium back to what it starts as, and forward into what it becomes. Each step is a documented one — a real route material takes, not a chain of inference.

Upstream — what it comes from

  • Beryllium → is produced by (magnesium reducing beryllium fluoride, and the reason beryllium is expensive before anyone accounts for how carefully it has to be handled) → Metallothermic reduction → takes as input (the cheapest reducing metal and the commonest, and the aluminium in thermite) → Aluminium → is extracted from (via alumina — bauxite is refined by the Bayer process before smelting) → Bauxite → is sourced from (the residue of prolonged tropical weathering, which strips the silica and alkalis out of an aluminosilicate rock and leaves the aluminium behind — basalt is one common parent among several) → Basalt → is composed of (an early-crystallising constituent of basaltic magma) → Olivine
  • Beryllium → is extracted from (the only commercial source of beryllium) → Beryl
  • Beryllium → is produced by (magnesium reducing beryllium fluoride, and the reason beryllium is expensive before anyone accounts for how carefully it has to be handled) → Metallothermic reduction → takes as input (reserved for halides and the most stubborn oxides, where the cheaper metals will not do the job) → Calcium → is produced by (from molten calcium chloride; there is no smelting route) → Molten salt electrolysis → takes as input (after concentration, as one of the two routes to lithium chloride) → Lepidolite
  • Beryllium → is produced by (magnesium reducing beryllium fluoride, and the reason beryllium is expensive before anyone accounts for how carefully it has to be handled) → Metallothermic reduction → takes as input (the cheapest reducing metal and the commonest, and the aluminium in thermite) → Aluminium → is produced by (collects at the cathode while the carbon anodes are consumed) → Hall–Héroult process → takes as input (dissolved in molten cryolite and electrolysed) → Aluminium oxide → is sourced from (dissolved out with hot caustic soda in the Bayer process) → Bauxite
  • Beryllium → is produced by (magnesium reducing beryllium fluoride, and the reason beryllium is expensive before anyone accounts for how carefully it has to be handled) → Metallothermic reduction → takes as input (the cheapest reducing metal and the commonest, and the aluminium in thermite) → Aluminium → is extracted from (via alumina — bauxite is refined by the Bayer process before smelting) → Bauxite → is sourced from (the residue of prolonged tropical weathering, which strips the silica and alkalis out of an aluminosilicate rock and leaves the aluminium behind — basalt is one common parent among several) → Basalt → is composed of (calcium-rich plagioclase is a defining constituent of basalt) → Plagioclase
  • Beryllium → is produced by (magnesium reducing beryllium fluoride, and the reason beryllium is expensive before anyone accounts for how carefully it has to be handled) → Metallothermic reduction → takes as input (the cheapest reducing metal and the commonest, and the aluminium in thermite) → Aluminium → is extracted from (via alumina — bauxite is refined by the Bayer process before smelting) → Bauxite → is sourced from (the residue of prolonged tropical weathering, which strips the silica and alkalis out of an aluminosilicate rock and leaves the aluminium behind — basalt is one common parent among several) → Basalt → is sourced from (partial melting of mantle peridotite is what basalt magma is — the residue left behind stays peridotite, depleted of what went into the melt) → Peridotite

These are the most distinct paths back. Beryllium can be traced through others besides.

Downstream — what it becomes

  • Beryllium → is used as (copper-beryllium alloys, for non-sparking and spring applications) → Alloying