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Ħ (minuscule: ħ) is a letter of the Latin alphabet, derived from H with the addition of a bar. It is used in Maltese for a voiceless pharyngeal fricative consonant (corresponding to the letter heth of Semitic abjads: Arabic: ح, Hebrew: ח). Lowercase ħ is used in the International Phonetic Alphabet for the same sound. It was used for this sound in the 1556 work of Pérez de Ayala, slightly modified from Pedro de Alcalá's Vocabulary.

In Unicode, the special character ℏ (U+210F), represents the reduced Planck constant of quantum mechanics. In this context, it is pronounced "h-bar".

The lowercase resembles the Cyrillic letter Tshe (ћ), or the astronomical symbol of Saturn (♄).

A white uppercase Ħ on a red square was the logo of Heritage Malta until 2022.

It is used as the symbol for Hedera Hashgraph's native cryptocurrency, HBAR.

Computer encoding

As a part of WGL-4, Ħ should be displayable on most computers.

See also

• Ĥ

References

1. Pérez de Ayala, Martín (1556). Christian doctrine in the Arabic-Spanish language. Valencia.
2. "Unicode Character 'PLANCK CONSTANT OVER TWO PI' (U+210F)".
3. "Heritage Malta Post".
4. "HBAR Website".

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