Datapoint Sri Lanka Portuguese/ɨ - high central unrounded vowel
[ɨ] is the usual allophone of /u/ in non-initial syllables when the preceding consonant is non-labial and the vowel of the preceding syllable is unrounded. This unrounding rule may be suppressed in careful speech.
It is transcribed as barred-u in Smith 1977, and as [ú] in Smith 1978.
Values 
Exists only as a minor allophone
- Example 41-221:
-
kaartuquarter