VNU Journal of Science Mathematics – Physics, Vol 37, No 4 (2021) 31 37 31 Original Article A Simulation Study of the Amorphous Germania Structure up to 70 GPa Mai Thi Lan1,*, Nguyen Thu Nhan1, Nguyen Thi Thao2, Pham Tri Dung3 1School of Engineering Physics, Hanoi University of Science and Technology, 1 Dai Co Viet, Hai Ba Trung, Hanoi, Vietnam 2Hong Duc University, 565 Quang Trung, Thanh Hoa, Vietnam 3Naval Academy, 30 Tran Phu, Vinh Nguyen, Nha Trang, Vietnam Received 01 December 2020 Revised[.]