Oxyphosphides are chemical compounds formally containing the group PO, with one

phosphorus Phosphorus is a chemical element; it has Chemical symbol, symbol P and atomic number 15. All elemental forms of phosphorus are highly Reactivity (chemistry), reactive and are therefore never found in nature. They can nevertheless be prepared ar ...

and one

oxygen Oxygen is a chemical element; it has chemical symbol, symbol O and atomic number 8. It is a member of the chalcogen group (periodic table), group in the periodic table, a highly reactivity (chemistry), reactive nonmetal (chemistry), non ...

atom. The phosphorus and oxygen are not bound together as in

phosphate Phosphates are the naturally occurring form of the element phosphorus. In chemistry, a phosphate is an anion, salt, functional group or ester derived from a phosphoric acid. It most commonly means orthophosphate, a derivative of orthop ...

s or

phosphine oxide Phosphine oxide is the inorganic compound with the formula H3PO. Although stable as a dilute gas, liquid or solid samples are unstable. Unlike many other compounds of the type POxHy, H3PO is rarely discussed and is not even mentioned in major so ...

s, instead they are bound separately to the cations (metals), and could be considered as a mixed

phosphide In chemistry, a phosphide is a compound containing the ion or its equivalent. Many different phosphides are known, with widely differing structures. Most commonly encountered on the binary phosphides, i.e. those materials consisting only of pho ...

oxide An oxide () is a chemical compound containing at least one oxygen atom and one other element in its chemical formula. "Oxide" itself is the dianion (anion bearing a net charge of −2) of oxygen, an O2− ion with oxygen in the oxidation st ...

compound. So a compound with O_mP_n requires

cation An ion () is an atom or molecule with a net electrical charge. The charge of an electron is considered to be negative by convention and this charge is equal and opposite to the charge of a proton, which is considered to be positive by convent ...

s to balance a negative charge of 2m+3n. The cations will have charges of +2 or +3. The trications are often rare earth elements or

actinide The actinide () or actinoid () series encompasses at least the 14 metallic chemical elements in the 5f series, with atomic numbers from 89 to 102, actinium through nobelium. Number 103, lawrencium, is also generally included despite being part ...

s. They are in the category of oxy-pnictide compounds. Many compounds are layered, containing two metals with the formula XZPO, with an XP layer alternating with a ZO layer.

Examples

Examples include *Ca₄P₂O greenish gold, has space group ''I''4''mmm'' Z=2 and unit cell parameters a = 4.492, c = 15.087. *Uranium–Copper Oxyphosphide UCuPO semimetallic antiferromagnetic tetragonal ZrCuSiAs-type a =3:7958 c=8:2456 V=118.80 Z=2 MW=348.55 density=9.743 *Thorium–Copper Oxyphosphide ThCuPO semimetallic tetragonal ZrCuSiAs-type a=3.8995 c=8.2939 V=126.12 Z=2 MW=342.56 density=9.02. *NpCuOP *Sr₂ScCoPO₃ high

thermoelectric The thermoelectric effect is the direct conversion of temperature differences to electric voltage and vice versa via a thermocouple. A thermoelectric device creates a voltage when there is a different temperature on each side. Conversely, when ...

effect has layers of CoP alternating with Sr₂ScO₃. *Sr₂ScFePO₃ superconducting 17K. *LaNiOP Lanthanum nickel oxyphosphide *YOFeP *YOMnP *YOCdP *ROTPn (R = La, Nd, Sm, Gd; T = Mn, Fe, Co, Ni, Cu; Pn = P, As, Sb) *YZnPO transparent red ''R'm'' Z=6 a = 3.946, c = 30.71 *LaZnPO transparent red ZrCuSiAs type *DyZnPO transparent red ''R'm'' Z=6 a=3.8933 c=30.305 *PrZnPO transparent red dimorphic *SmZnPO transparent red ''R'm'' Z=6 a = 3.946, c = 30.71 *NdZnPO transparent a = 3.885 c = 30.32 *GdZnPO transparent red ''R'm'' Z=6 a=3.922, c = 30.56 *CeZnPO transparent *HoZnPO transparent dark red *CeRuPO ferromagnetic below 15K. dimorphic *CeOsPO antiferromagnetic

related phosphide oxides

*La₂AuP₂O C2/m, a=15.373 b=4.274 c=10.092 β=131.02 V=500.3 dark-red-violet *Ce₂AuP₂O C2/m, a = 15.152, b = 4.2463, c = 9.992 pm, β = 130.90° dark-red-violet *Pr₂AuP₂O C2/m, a = 15.036, b = 4.228, c = 9.930 pm, β = 130.88(2)° dark-red-violet *Nd₂AuP₂O C2/m, a = 15.0187, b = 4.2085, c = 9.903 pm, β = 131.12(1)° dark-red-violet

Oxy-pnictides

Related compounds are the oxybismuthides and

oxyarsenide Oxyarsenides or arsenide oxides are chemical compounds formally containing the group AsO, with one arsenic and one oxygen atom. The arsenic and oxygen are not bound together as in arsenates or arsenites, instead they make a separate presence bound ...

References

{{Phosphides Phosphides Oxides