dual boot - How to determine FS type of windows partition

I just purchased a hp probook 450 which came with pre-installed Windows 10 pro. I shrank the main partition in order to create a ubuntu partition with dual boot (ubuntu 16.04).

This has worked fine so far, until I tried to mount the main partition of my hard drive. The problem with the mount command is that I cannot determine the FS type of the windows partition. I would expect it is NTFS, but now I don't know for sure.

Thanks to fdisk -l, I know the device file for the partition I want to mount is /dev/nvme0n1p3, but the mount command does not work:

> sudo mount -t ntfs -o nls=utf8,umask=0222 /dev/nvme0n1p3 /win
NTFS signature is missing.
Failed to mount '/dev/nvme0n1p3': Invalid argument
The device '/dev/nvme0n1p3' doesn't seem to have a valid NTFS.
Maybe the wrong device is used? Or the whole disk instead of a
partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?

I ran multiple commands to try to determine the file system, but without success.

The df does not show the partition I want to mount.

> sudo df -khT
Filesystem     Type      Size  Used Avail Use% Mounted on
udev           devtmpfs  7.8G     0  7.8G   0% /dev
tmpfs          tmpfs     1.6G  9.6M  1.6G   1% /run
/dev/nvme0n1p6 ext4       23G  5.9G   16G  27% /

tmpfs          tmpfs     7.8G   32M  7.8G   1% /dev/shm
tmpfs          tmpfs     5.0M  4.0K  5.0M   1% /run/lock
tmpfs          tmpfs     7.8G     0  7.8G   0% /sys/fs/cgroup
/dev/nvme0n1p7 ext4      3.9G  184M  3.5G   5% /home
/dev/nvme0n1p1 vfat      356M   69M  288M  20% /boot/efi
tmpfs          tmpfs     1.6G   52K  1.6G   1% /run/user/1000

The fdisk command shows all partitions, but does not display the FS type.

> sudo fdisk -l
Disk /dev/nvme0n1: 477 GiB, 512110190592 bytes, 1000215216 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: ......

Device             Start        End   Sectors  Size Type
/dev/nvme0n1p1      2048     739327    737280  360M EFI System

/dev/nvme0n1p2    739328    1001471    262144  128M Microsoft reserved
/dev/nvme0n1p3   1001472  896438271 895436800  427G Microsoft basic data
/dev/nvme0n1p4 953784320  957362175   3577856  1.7G Windows recovery environment
/dev/nvme0n1p5 957362176 1000204287  42842112 20.4G Microsoft basic data
/dev/nvme0n1p6 896438272  945266687  48828416 23.3G Linux filesystem
/dev/nvme0n1p7 945266688  953784319   8517632  4.1G Linux filesystem

The lsblk command shows no FSTYPE for the partition I want to access.

> lsblk -f
NAME        FSTYPE LABEL            MOUNTPOINT
nvme0n1
├─nvme0n1p5 ntfs   Recovery Image    
├─nvme0n1p3                          
├─nvme0n1p1 vfat   SYSTEM           /boot/efi
├─nvme0n1p6 ext4                    /
├─nvme0n1p4 ntfs   Windows RE tools 
├─nvme0n1p2                                                              
└─nvme0n1p7 ext4                    /home

Can anybody help me in mounting this partition ?

Thank you all for your answers. I tried them but it still didn't work. However, while looking at the disks utility in Windows, I noticed something that came out of my mind while installing: the disk is actually encrypted with bitlocker.

This is the reason why lsblk was not able to show the FS type. So, I went to this post and was able to decrypt and mount my Windows drive.