EDIT Russian letter The 27th letter of the Russian alphabet is a palatal sh, i. e. pronounced like the English sh, but much more softly

lower case letter corresponding to the upper case Щ (U+0429 CYRILLIC CAPITAL LETTER SHCHA)

Transliteration
international transliteration (ISO 9) - ŝ (U+015D LATIN SMALL LETTER S WITH CIRCUMFLEX)
English transliteration (BSI, ALA) - shch

Example:
Никита Сергеевич Хрущёв (1894-1971; 1953-1964 First Secretary of the Communist Party of the Soviet Union, 1958-1964 Chairman of the Council of Ministers; \\\"Khrushchev Thaw\\\" era):
ISO 9 - Hruŝёv
BSI, ALA - Khrushchev, Khrushchёv, Khrushchyov

 fischer-hd