ORB file format description

Many people share .orb files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .orb file can be edited, converted or printed with. On this page, we try to provide assistance for handling .orb files.

1 filename extension(s) found in our database.

.orb - XMVB Optimized VB Orbitals

The ORB data files are related to XMVB. The ORB file is a XMVB Optimized VB Orbitals. Xiamen Valence Bond (XMVB) is a quantum chemistry program for performing electronic structure calculations based on the non-orthogonal Valence Bond methods.

Data files
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XMVB Optimized VB Orbitals related extensions:
XMVB Density Data
XMVB Orbital Guess Data
XMVB Data File
XMVB Input File
XMVB Output File

Naturally, other applications may also use the .orb file extension. Even harmful programs can create .orb files. Be especially cautious with .orb files coming from an unknown source!

Can't open a .orb file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .orb file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

irb, krb, ob, obr, odb, oeb, ofb, orf, org, orv, otb, prb, rb, rob

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Borland C++ Object Browser Data
OSGi Bundle Repository Data
Objective ECM Reference Document Link
OpenOffice.org Base Database
OTA Bitmap
ABF Outlook Backup Archive

Operating systems

DataTypes.net currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

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DataTypes.net >> ORB file