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Hydrogen deuteride is a diatomic molecule composed of the two isotopes of hydrogen: the Hydrogen deuteride is a minor component of naturally occurring molecular hydrogen. — “Hydrogen deuteride - Wikipedia, the free encyclopedia”, en.wikipedia.org
The corresponding lithium-6 deuteride, formula 6Li2H or 6LiD, is the fusion fuel in thermonuclear weapons. In warheads of the Teller-Ulam design, a fission trigger explosion heats, compresses and bombards 6LiD with neutrons to produce tritium in an exothermic reaction. — “Lithium hydride - Wikipedia, the free encyclopedia”, en.wikipedia.org
Deuterium thus accounts for approximately 0.0156% (alternately, on a Deuterium occurs in trace amounts naturally as deuterium gas, written 2H2 or D2, but most natural occurrence in the universe is bonded with a typical 1H atom, a gas called hydrogen deuteride (HD or 1H2H).. — “Deuterium - Wikipedia, the free encyclopedia”, en.wikipedia.org