* Zarif in Vienna mainly for nuclear talks with world powers * Defends Iran's human rights record before Austrian MPs * Ack**wledges room for improvements -meeting participants By Michael Shields VIENNA, March 19 (Reuters) - foreign minister Mohammed Javad Zarif defended Iran's human rights record to Austrian members of parliament on Wednesday but ack**wledged there was room for improvement, according to people who took part in the meeting. In Vienna for Iran's nuclear negotiations with big powers, Zarif met members of parliament's foreign affairs committee for talks on Iranian relations with the West, its nuclear programme, human rights and the situation in Syria, participants said. Alev Korun, a Greens party MP and human rights specialist, said she had the chance to discuss the issue with Zarif. "He did **t have a negative view on the situation in his country but **ted that human rights can still be improved everywhere," she said after the hour-and-a-half meeting Behind closed doors.