Russian Alphabet
The modern Russian alphabet is based on the Cyrillic script and consists of 33 letters: 10 vowels, 21 consonants, and 2 orthographic signs that modify preceding sounds.
Classification of Letters
Vowels
Russian vowels are split into hard-indicating and soft-indicating (iotated) pairs:
Hard-indicating vowels: А, Э, Ы, О, У
Soft-indicating vowels: Я, Е, И, Ё, Ю (these typically palatalize the preceding consonant or represent a leading /j/ sound)
Consonants
Most Russian consonants exist in voiced/voiceless pairs:
Voiced: Б, В, Г, Д, Ж, З
Voiceless: П, Ф, К, Т, Ш, С
Unpaired consonants:
Unpaired voiced: Л, М, Н, Р, Й
Unpaired voiceless: Х, Ц, Ч, Щ
Orthographic Signs
Hard Sign (Ъ): Separates a prefix ending in a consonant from a following iotated vowel, preventing palatalization.
Soft Sign (Ь): Indicates that the preceding consonant is palatalized (pronounced with the tongue raised toward the hard palate).
Categorization for Learners
True Friends (look and sound similar to Latin letters):
А (a), К (k), М (m), О (o), Т (t)
False Friends (look like Latin letters but produce different sounds):
В (/v/), Е (/ye/), Н (/n/), Р (/r/), С (/s/), У (/oo/), Х (/kh/)
New Letters with Familiar Sounds:
Б (/b/), Г (/g/), Д (/d/), З (/z/), И (/ee/), Л (/l/), П (/p/), Ф (/f/), Э (/e/)
Distinctive Slavic Sounds:
Ж (/zh/), Ц (/ts/), Ч (/ch/), Ш (/sh/), Щ (/shch/), Ы (/ɨ/ - deep 'i' sound), Ю (/yu/), Я (/ya/)