SANTIAGO (Reuters) - Chile's SQM, the world's second-largest lithium producer, reported a bigger-than-expected 63.2% slide in its quarterly profit on Wednesday due to weak prices of the battery metal, which it expects will continue for the rest of the year.

The miner, which also produces fertilizers and industrial chemicals, posted a second-quarter net profit of $213.6 million, or 75 cents a share, missing analysts estimates of $296.7 million, or 95 cents a share, according to LSEG data.

Its revenue of $1.3 billion in the quarter was in line with analysts's expectations, based on LSEG data.

SQM produces the white metal in the Atacama salt flat of northern Chile, home to the world's highest lithium concentration in brine, giving it an advantage of low-cost production.

But, while it posted record-high quarterly sales volumes of lithium, its results were dragged down by a significant drop in the metal's prices and CEO Ricardo Ramos said that trend will continue.

"We see this pricing trend continuing in the second half of this year, with current lithium price indices in China nearly 20% lower than the average lithium price indices in the second quarter of 2024."

A basket of lithium prices tracked by Benchmark Mineral Intelligence shows they have fallen about 70% over the past year because of weaker-than-expected global demand for electric vehicles due, in part, to high borrowing costs and global uncertainty.

Ramos said some lithium producers may reduce their output since the low prices made projects economically unviable.

SQM said it will continue with its expansion plans, although it is reevaluating specific markets and initiatives that may be "less attractive in the near term under these conditions."

U.S. rival Albemarle, which also operates in Atacama, said last month it would cut costs, after posting a second-quarter loss.

(Reporting by Daina Beth Solomon and Harshita Meenaktshi in Bengaluru; Editing by Savio D'Souza)