This character is a Puntuación matemática and is commonly used, that is, in no specific script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+25FA forms with similar adjacent characters prevents a line break inside it.
El Wikipedia tiene la siguiente información acerca de este punto de código:
Geometric Shapes is a Unicode block of 96 symbols at code point range U+25A0–25FF.
Representaciones
Sistema
Representación (click value to copy)
N.º
9722
UTF-8
E2 97 BA
UTF-16
25 FA
UTF-32
00 00 25 FA
URL-Quoted
%E2%97%BA
HTML hex reference
◺
Mojibake mal de windows-1252
â—º
HTML named entity
◺
Codificación: GB18030 (hexadecimales bytes)
81 37 A2 31
RFC 5137
\u'25FA'
Bash and Zsh inside echo -e
\u25FA
C and C++
\u25FA
C#
\u25FA
CSS
\0025FA
Excel
=UNICHAR(9722)
Go
\u25FA
JavaScript
\u25FA
Modern JavaScript since ES6
\u{25fa}
JSON
\u25FA
Java
\u25FA
Lua
\u{25FA}
Matlab
char(9722)
Perl
"\x{25FA}"
PHP
\u{25fa}
PostgreSQL
U&'\25FA'
PowerShell
`u{25FA}
Python
\u25FA
Ruby
\u{25fa}
Rust
\u{25fa}
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