The clock will be ticking though on the second day of a final round of talks, with the deadline for Iran and the five permanent members of the UN Security Council plus Germany on Monday.
"This is a very critical week obviously in Iran negotiations," US Secretary of State John Kerry, expected in the Austrian capital later in the week, said in London yesterday.
"We hope we get there but we can't make any predictions."
"If, because of excessive demands... We don't get a result, then the world will understand that the Islamic Republic sought a solution, a compromise and a constructive agreement and that it will not renounce its rights and the greatness of the nation," Zarif told Iranian media.
Kerry though, who held the latest in a string of meetings with Zarif in Oman last week, put the onus on Iran.
British Foreign Secretary Philip Hammond echoed his comments, calling for more "flexibility by the Iranians to convince us that their intentions in their nuclear programme are entirely peaceful".
The landmark accord being sought by Monday's deadline, after months of negotiations, is aimed at easing fears that Tehran might develop nuclear weapons under the guise of its civilian activities.
It could resolve a 12-year standoff, silence talk of war, help normalise Iran's relations with the West, boost the beleaguered Iranian economy and mark a rare foreign success for US President Barack Obama.
Iran, which insists its nuclear aims are exclusively peaceful despite failing to declare parts of its programme in the past, wants painful sanctions lifted.
Some areas appear provisionally settled. But the big problem remains enrichment, rendering uranium suitable for power generation and other peaceful uses -- but also, at high purities, for a weapon.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
