The phrase "an unprecedented array of" is correct and usable in written English.
It can be used to describe a collection or variety of things that is unique or has never been seen before.
Example: "The conference showcased an unprecedented array of innovative technologies that could change the industry."
Alternatives: "a remarkable selection of" or "an extraordinary range of".
Libyan coöperation has yielded an unprecedented array of evidence in a case of nuclear trading.
The exhibition brings together an unprecedented array of dresses, uniforms and robes worn at the historic event.
The government says it was based on an unprecedented array of public consultations and followed the rules.
At the same time, an unprecedented array of political and pop cultural figures have helped normalize the image of Latinos in the mainstream imagination.
With Tomas Rosicky twinkling anew, the team's two most dangerous players so far this season – Alexis Sánchez and Santi Cazorla – resting on the bench, and Danny Welbeck and Alex Oxlade-Chamberlain nearing full fitness, Wenger admits he has an unprecedented array of attacking options.
They replaced Bush's loud sunburst carpet in the Oval Office with a simple cream affair and filled the house with an unprecedented array of modern and contemporary art, hanging paintings by Josef Albers and Robert Rauschenberg and sculptures by native and African American artists – as well as replacing a Churchill bust with Martin Luther King.
Governments around the world are facing significant political turmoil and enormous economic stress as they struggle with an alarming and unprecedented array of public-policy crises.
So today, pause for a moment and take full advantage of the unprecedented array of tools we have for connecting with others and expressing our views.
The unprecedented array of threats described by Brennan and Clapper last year in Aspen are growing worse.
The unprecedented array of objects and stories at the Barbican is not simply for admiration but inspiration to folks in myriad fields".
Transcriptional data obtained from promoter-luciferase reporter arrays also show an unprecedented, high level of activation of CREB-bound promoters in the presence of the co-activator protein TORC1.
