https://apm.bplaced.net/w/index.php?action=history&feed=atom&title=Simple_compounds_including_more_rare_elements
Simple compounds including more rare elements - Revision history
2026-04-20T13:43:27Z
Revision history for this page on the wiki
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https://apm.bplaced.net/w/index.php?title=Simple_compounds_including_more_rare_elements&diff=17703&oldid=prev
Apm at 13:34, 27 March 2025
2025-03-27T13:34:55Z
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:34, 27 March 2025</td>
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Apm
https://apm.bplaced.net/w/index.php?title=Simple_compounds_including_more_rare_elements&diff=17702&oldid=prev
Apm: basic page
2025-03-27T13:34:45Z
<p>basic page</p>
<p><b>New page</b></p><div>{{stub}} <br><br />
Still much to add here.<br />
<br />
= Transiton metal oxides =<br />
<br />
https://en.wikipedia.org/wiki/Category:Transition_metal_oxides<br />
<br />
== Scandium ==<br />
<br />
Scandium kangite https://en.wikipedia.org/wiki/Kangite<br />
<br />
== Titanium ==<br />
<br />
Ti<sub>2</sub>O<sub>3</sub> https://en.wikipedia.org/wiki/Tistarite<br />
<br />
Titanium is common so not listed here. See: [[Rutile]]<br />
<br />
== Vanadium ==<br />
<br />
VO<sub>2</sub>, https://en.wikipedia.org/wiki/Vanadium_oxide <br><br />
paramontroseite, orthrhombic, Mohs:?(likely mid hard), <br><br />
https://en.wikipedia.org/wiki/Paramontroseite (transparent) <br><br />
<br />
== Chromium ==<br />
<br />
https://en.wikipedia.org/wiki/Chromium_oxide<br />
<br />
CrO https://en.wikipedia.org/wiki/Chromium(II)_oxide <br><br />
<br />
Cr<sub>2</sub>O<sub>3</sub>, https://en.wikipedia.org/wiki/Chromium(III)_oxide <br><br />
https://en.wikipedia.org/wiki/Eskolaite (trigonal, Mohs 8.0 to 8.5)<br />
<br />
CrO<sub>2</sub>, https://en.wikipedia.org/wiki/Chromium(IV)_oxide <br><br />
rutile structure; are there natural minerals? Always opaque?<br />
<br />
CrO<sub>3</sub> https://en.wikipedia.org/wiki/Chromium_trioxide<br />
<br />
== Manganese ==<br />
<br />
MnO<sub>2</sub>, sutile structure, https://en.wikipedia.org/wiki/Pyrolusite <br><br />
Always opaque? <br><br />
https://en.wikipedia.org/wiki/Manganese_dioxide (tetragonal, Mohs 6.0 to 6.5) <br><br />
https://en.wikipedia.org/wiki/Ramsdellite (orthorhombic, Mohs 3) <br><br />
https://en.wikipedia.org/wiki/Akhtenskite (hexagonal, Mohs ?) <br><br />
<br />
== Iron ==<br />
<br />
Iron is common so not listed in detail here.<br />
<br />
https://en.wikipedia.org/wiki/Iron_oxide <br><br />
FeO https://en.wikipedia.org/wiki/W%C3%BCstite (rock salt structure, Mohs 5.0 to 5.5) <br><br />
FeO https://en.wikipedia.org/wiki/Iron(II)_oxide <br><br />
Fe<sub>3</sub>O<sub>4</sub> https://en.wikipedia.org/wiki/Magnetite <br><br />
Fe<sub>2</sub>O3<sub>4</sub> https://en.wikipedia.org/wiki/Hematite <br><br />
<br />
== Cobalt ==<br />
<br />
https://en.wikipedia.org/wiki/Cobalt_oxide<br />
CoO https://en.wikipedia.org/wiki/Cobalt(II)_oxide <br><br />
https://en.wikipedia.org/wiki/Cobalt(II,III)_oxide <br><br />
<br />
== Nickel ==<br />
<br />
https://en.wikipedia.org/wiki/Nickel_oxide <br><br />
<br />
NiO https://en.wikipedia.org/wiki/Nickel(II)_oxide <br><br />
NiO https://en.wikipedia.org/wiki/Bunsenite (rock salt structure, Mohs 5.5) <br><br />
<br />
NiFe2O4 https://en.wikipedia.org/wiki/Trevorite (iron rich, cubic, Mohs 5) <br><br />
<br />
== Copper ==<br />
<br />
https://en.wikipedia.org/wiki/Copper_oxide<br />
<br />
Cu<sub>2</sub>O https://en.wikipedia.org/wiki/Copper(I)_oxide <br><br />
https://en.wikipedia.org/wiki/Cuprite (transparent, Mohs 3.5 to 4.0) <br><br />
<br />
CuO https://en.wikipedia.org/wiki/Copper(II)_oxide <br><br />
https://en.wikipedia.org/wiki/Tenorite (monoclinic, Mohs 3.5 to 4.0)<br />
<br />
== Zinc ==<br />
<br />
https://en.wikipedia.org/wiki/Zinc_oxide<br />
https://en.wikipedia.org/wiki/Zincite (transpatent, hexagonal, Mohs 4)<br />
<br />
= Transition metal nitrides =<br />
<br />
== Scandium ==<br />
<br />
ScN, scandium nitride, https://en.wikipedia.org/wiki/Scandium_nitride <br><br />
"indirect bandgap of 0.9 eV and direct bandgap of 2 to 2.4 eV" <br><br />
<br />
= Group 13 boron ==<br />
<br />
Many very hard and high performance materials here. Manny allotropes and polymorphs.<br />
<br />
= Group 13 beyond extremely abundant aluminum =<br />
<br />
Compounds with one of the main components being one of Ga, In, Tl<br />
<br />
= Group 14 beyond Si =<br />
<br />
Compounds with one of the main components being one of Ge, Sn, Pb<br />
<br />
= Group 15 beyond P (heavy pnictogens) =<br />
<br />
Compounds with one of the main components being one of As, Sb, Bi<br />
<br />
= Group 16 beyond S (heavy chalkogenides) =<br />
<br />
Compounds with one of the main components being one of Se, Te, (Po)<br />
<br />
= Other =<br />
<br />
== Group 1 & 2 top rare: Lithium and Beryllium ==<br />
<br />
BeO https://en.wikipedia.org/wiki/Bromellite<br />
<br />
https://en.wikipedia.org/wiki/Lithium_oxide<br />
<br />
== Group 1 rare Rubidium & Cesium ==<br />
<br />
== Group 2 rare Strontium & Barium (& Radium) ==<br />
<br />
= Related =<br />
<br />
* [[Gemstone]]<br />
* [[Oddball compound]]</div>
Apm