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diff --git a/graphics/pgf/contrib/pgf-periodictable/README b/graphics/pgf/contrib/pgf-periodictable/README
index f33f53fa72..6015fa1578 100644
--- a/graphics/pgf/contrib/pgf-periodictable/README
+++ b/graphics/pgf/contrib/pgf-periodictable/README
@@ -1,11 +1,11 @@
-This is pgf-PeriodicTable, version 2.1.0a (2024/04/03).
+This is pgf-PeriodicTable, version 2.1.5 (2025/02/10).
The purpose of this package is to provide the Periodic Table of Elements in
a simple way. It relies on pgf/TikZ to offer a full or partial periodic table with
a variety of options and displaying the desired data for all the 118
elements. It can be done in different languages: English, French, German,
Portuguese (from Portugal and from Brazil), Spanish, Italian and translations
-by user contributions (currently Dutch).
+by user contributions - currently in Dutch and Chinese.
____________________________________________________________
Just typeset \pgfPT to get a Periodic Table of Elements or \pgfPT[<options list>]
@@ -21,6 +21,62 @@ ____________________________________________________________
____________________________________________________________
Major changes:
+*** v2.1.5 (10/02/2025) ***
+New options for loading the package, fixing the interaction of pgf-PeriodicTable with the beamer class and pdfLaTeX (small caps):
+- beamer (requires the lmodern package)
+- beamer*
+- beamer** (requires the silence package)
+New translation:
+- Chinese translation provided by Fan Hongtao
+New commands for Chinese language:
+- \pgfPTzhFontFeatures
+- \pgfPTzhtextfontSS
+- \pgfPTzhtextfontSSB
+- \pgfPTzhtextfontLv
+Changes to the default values of the following keys when the Chinese langauge is loaded:
+- name font
+- CS font
+- title font
+- Z font
+- Z padding
+Changes in Mandarin numerals:
+- default font is now BabelStone Han
+- the \pgfPTzhfont command has been renamed to \pgfPTzhnumberfont (\pgfPTzhfont is still defined for backwards compatibility)
+New keys:
+- decimal separator (sets the decimal separator in the numerical values of quantities)
+- legend acronyms font size (sets the font size of the text used in the legend acronyms description)
+New color schemes:
+- pgfPTWikipediaI
+- pgfPTWikipediaII
+New styles:
+- comma separator
+- dot separator
+- csWikipediaI
+- csWikipediaII
+The Z list key supports a new syntax which makes possible to get empty cells anywhere in the Periodic Table.
+Fixed an incorrect translation for 'fermium' in German.
+New section in package documentation 'Tips & Tricks: inspired by user questions'.
+
+*** v2.1.4 (08/09/2024) ***
+Fixed wrong box width on extra legend of Country of Discovery.
+Fixed minor issues in pgfPTbuildcell macros.
+Added the prefix 'pgfPT' to the built-in back color schemes. They are now 'pgfPTdefault', 'pgfPTSoft', 'pgfPTJmol',
+'pgfPTCPK', 'pgfPTRasmol', 'pgfPTRasmolNew', 'pgfPTWikipedia', 'pgfPTMNM', 'pgfPTPS', 'pgfPTRadio' and 'pgfPTBlocks'.
+Fixed some typos in the manual.
+
+*** v2.1.3 (07/08/2024) ***
+The engine's detection mechanism (pdfLaTeX, LuaLaTeX or XeTeX) has been changed to prevent erroneous detection when the packages 'hyperref' or 'bookmark' are loaded and the document is compiled with LuaLaTeX - in this case, pgf-PeriodicTable disturbs the selection of the document font.
+Fixed an issue with the Chemical Symbol color when a non-rgb color is used, such as cyan or yellow , which are defined in the xcolor package using the cmyk model (when loaded without options).
+
+*** v2.1.2 (01/08/2024) ***
+Fixed incorrect Spanish translations of some element names.
+Minor code improvements to eliminate runtime warnings («LaTeX Font Warning: Font shape `TU/TeXGyreHeros(0)/l/n' undefined» or «Missing character: There is no m (U+006D) in font nullfont!» ... )
+
+*** v2.1.1 (07/07/2024) ***
+New keys:
+- group numbers (to display group numbers in arabic numerals, Roman numerals or both)
+- Roman label color (sets the color of the Roman numerals)
+- O Roman (the oxidation numbers are presnted in Roman numerals)
*** v2.1.0a (03/04/2024) ***
Translation files have been renamed from 'lang.{undefined,nl}.tex' to 'pgfPT.lang.{undefined,nl}.tex' to match the runtime tree of TeX Live (names must be globally unique for reliable searching).