U+1D6DF "𝛟" Mathematical Bold Phi Symbol Unicode Character

U+1D6DF "𝛟" Mathematical Bold Phi Symbol is a typographic representation of the Greek letter phi in a bold weight, designed for use in mathematical and scientific notation where clear distinction between different variables is necessary. It belongs to the Mathematical Alphanumeric Symbols block, which provides separate characters for letters in various styles to avoid ambiguity with standard text. This bold phi is typically used to denote the golden ratio, magnetic flux, or other specialized quantities in contexts like physics, engineering, or number theory, ensuring that its bold appearance sets it apart from italic or regular glyphs in complex formulas.

General Properties

Code Point	U+1D6DF
Version Added	3.1
Name	Mathematical Bold Phi Symbol
Block	Mathematical Alphanumeric Symbols
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"ϕ" U+03D5 Greek Phi Symbol

Encodings

HTML Decimal Encoding	𝛟
HTML Hex Encoding	𝛟
UTF-8 Encoding	0xF0 0x9D 0x9B 0x9F
UTF-16 Encoding	0xD835 0xDEDF
UTF-32 Encoding	0x0001D6DF
C/C++/Java Escape	\ud835\udedf

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Lowercase	Yes
Cased	Yes
Changes When NFKC Casefolded	Yes
NFKC Casefold	"φ" U+03C6 Greek Small Letter Phi
NFKC Simple Casefold	"φ" U+03C6 Greek Small Letter Phi
Script	Common
Script Extensions	Common
Indic Syllabic Category	Other
ID Start	Yes
XID Start	Yes
ID Continue	Yes
XID Continue	Yes
Alphabetic	Yes
Math	Yes
Other Math	Yes
Vertical Orientation	Rotated
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Alphabetic letter
Sentence Break	Lower