Borate phosphate

Borate phosphates are mixed anion compounds containing separate borate and phosphate anions. They are distinct from the borophosphates where the borate is linked to a phosphate via a common oxygen atom. The borate phosphates have a higher ratio of cations to number of borates and phosphates, as compared to the borophosphates.^[1]

Borate phosphate

Identifiers
3D model (JSmol)	1:1: Interactive image
ChemSpider	1:1: 24769519
InChI 1:1: InChI=1S/BO3.H3O4P/c2-1(3)4;1-5(2,3)4/h;(H3,1,2,3,4)/q-3;/p-3 Key: IVHMVLWSSMPWPQ-UHFFFAOYSA-K
SMILES 1:1: B([O-])([O-])[O-].[O-]P(=O)([O-])[O-]
Properties
Chemical formula	BO7P−6
Molar mass	153.78 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

There are also organic esters of both borate and phosphate, e.g. NADH-borate.^[2]

Production

In the high temperature method, ingredients are heated together at atmospheric pressure. Products are anhydrous, and production or borophosphates is likely.^[3]

The boron flux method involves dissolving ingredients such as an ammonium phosphate and metal carbonate in an excess of molten boric acid.^[3]

Use

Borate phosphates are of research interest for their optical, electrooptical or magnetic properties.^[3]

List

	chem	mw	crystal system	space group	unit cell Å	volume	density	comment	references
	Be3(BO3)(PO4)		hexagonal					SHG	[1][4]
	α-Mg3[BPO7]		orthorhombic	Immm	a=8·495, b=4·886, c=12·565 Z=4				[5]
	Mg3[BPO7]		monoclinic	Cm					[3]
	Mg3[BPO7]		hexagonal	P6_2m					[3]
Lüneburgite	Mg3[B2(OH)6](PO4)2 · 6H2O		triclinic				2.05	Biaxial (-) nα = 1.520 – 1.522 nβ = 1.540 – 1.541 nγ = 1.545 – 1.548 2V 52° to 60° Max birefringence δ = 0.025 – 0.026	[6][7]
	Ca3[BPO7]		monoclinic		a=8.602 b=4.891 c=12.806 β=102.30				[5]
Seamanite	Mn2+3[B(OH)4](PO4)(OH)2		orthorhombic	Pbnm	a = 7.81 Å, b = 15.11 Å, c = 6.69 Å Z=4	789.48	3.08	Biaxial (+) nα = 1.640 nβ = 1.663 nγ = 1.665 2V 40° Max birefringence δ = 0.025	[8][9]
Laptevite-(Ce)	Ca6(Fe2+,Mn2+)Y3REE7(SiO4)3(PO4)(B3Si3O18)(BO3)F11		trigonal	R3m	a = 10.804, c = 27.726 Z=3	2802.6	4.61	Uniaxial (-) nω = 1.741 nε = 1.720 Max birefringence δ = 0.021	[10]
	(CoPO4)4, B5O6(OH)4N(CH3)4(CH3NH3)	1036.10	orthorhombic	I222	a=6.7601 b=7.5422 c=34.822 Z=2	1775.4	1.938	red	[11]
	Co3[BPO7]		monoclinic	Cm	a=9.774, b=12.688, c=4.9057, β=119.749°; Z=4	528.2		purple	[3]
	α-Zn3[BPO7]	349.89	orthorhombic		a=8.438 b=4.884 c=12.558				[5]
	α-Zn3[BPO7]	349.89	monoclinic	Cm	a=9.725 b=12.720 c=4.874 β=119.80 Z=4				[3][12]
	β-Zn3[BPO7]	349.89	hexagonal	P-6	a=8.4624 c=13.0690 Z=6	810.51	4.301	colourless	[3][13]
	α-Sr3[BPO7]		orthorhombic		a=9.0561, b=9.7984, c=13.9531				[14]
	Sr10[(PO4)5.5(BO4)0.5](BO2)			P3_	a=9.7973, c=7.3056, Z=1	607.29			[15]
	SrCo2(BO3)(PO4)	359.26	monoclinic	P21/c	a=6.485 b=9.270 c=10.066 β=111.14 Z=4	548.7	4.349	red	[1][16]
Byzantievite	Ba5(Ca,REE,Y)22(Ti,Nb)18(SiO4)4[(PO4, SiO4)]4(BO3)9O22[(OH),F]43(H2O)1.5		trigonal	R3	a = 9.1202, c = 102.145	7,357.9	4.10	Uniaxial (-) nω = 1.940 nε = 1.860 Max birefringence δ = 0.080 16 different layers in structure	[17][18]
Rhabdoborite	Mg12(V5+,Mo6+,W6+)1 · 5O6{[BO3]6-x[(P,As)O4]xF2-x} (x < 1)		hexagonal	P63	a = 10.6314, c = 4.5661	446.95			[19]
	CsNa2Y2(BO3)(PO4)2	605.46	orthorhombic	Cmcm	a=6.9491 b=14.907 c=10.6201 Z=4	1100.2	3.655	colourless	[20]
	CsZn4(BO3)(PO4)2	679.30	orthorhombic	Pbca	a=14.49 b=10.02 c=16.45 Z=8	2388	3.779	colourless	[21]
	Ba3(BO3)(PO4)		hexagonal	P63mc	a=5.4898, c=14.7551, Z=2				[1][22]
	Ba3(BO3)(PO4)		monoclinic	P2/m	a = 11.7947, b = 9.6135, c = 12.9548, β= 111.25°	1369.08			[23]
	Ba11B26O44(PO4)2(OH)6		monoclinic	P21/c	a=6.891, b=13.629, c=25.851, β=90.04°				[24]
	Ba3(ZnB5O10)PO4	786.41	orthorhombic	Pnm21	a = 10.399 b = 7.064 c = 8.204 Z=2	602.6	4.334		[25]
	La7O6(BO3)(PO4)2		monoclinic		a=7.019 b=17.915 c=12.653 β=97.52	1577.27			[1][26]
	Pr7O6(BO3)(PO4)2		monoclinic	P121/n1	a=6.8939 b=17.662 c=12.442 β=97.24 Z=4	1502.9		green	[1][27]
	Nd7O6(BO3)(PO4)2		monoclinic		a=6.862 b=17.591 c=12.375 β=97.18	1482.12			[1][26]
	Sm7O6(BO3)(PO4)2		monoclinic	P121/n1	a=6.778 b=17.396 c=12.218 β=96.96 Z=4	1430.0		yellow	[1][27]
	CsNa2Sm2(BO3)(PO4)2	728.34	orthorhombic	Cmcm	a=7.0631 b=15.288 c=10.725 Z=4	1158.1	4.177	colourless	[28]
	CsNa2Ho2(BO3)(PO4)2								[29]
	CsNa2Er2(BO3)(PO4)2								[29]
	CsNa2Tm2(BO3)(PO4)2								[29]
	Gd7O6(BO3)(PO4)2		monoclinic		a=6.704 b=17.299 c=12.100 β=96.94	1393.11			[1][26]
	Dy7O6(BO3)(PO4)2		monoclinic		a=6.623 b=17.172 c=11.960 β=96.76	1350.84			[1][26]
	K3Yb[OB(OH)2]2[HOPO3]2			R3_	a=5.6809, c=36.594 Z=3	1022.8			[1][30]
	CsNa2Yb2(BO3)(PO4)2								[29]
	K3Lu[OB(OH)2]2[HOPO3]2			R3_	a=5.6668, c=36.692 Z=3	1020.4			[1][30]
	CsNa2Lu2(BO3)(PO4)2	777.58	orthorhombic	Cmcm	a = 6.8750 b = 14.6919 c = 10.5581	1066.44	4.843
	Pb4O(BO3)(PO4)	998.54	monoclinic	P21/c	a=10.202 b=7.005 c=12.92 β=113.057 Z=4	849.6	7.807	colourless	[31]
	LiPb4(BO3)(PO4)2	1084.85	orthorhombic	Pbca	a=12.613 b=6.551 c=25.63 Z=8	2095	6.875	colourless	[1]
	Bi4O3(BO3)(PO4)	1037.70	orthorhombic	Pbca	a=5.536 b=14.10 c=22.62 Z=8	1766	7.807	colourless	[31]
	Th2[BO4][PO4]		monoclinic	P21/c	a=8.4665, b=7.9552, c=8.2297, β= 103.746° Z = 4				[32]
	Ba5[(UO2)(PO4)3(B5O9)]·nH2O							interlocking nanotubes; absorbs water from air	[33]
	U2[BO4][PO4]	645.84	monoclinic	P21/c	a = 8.546, b = 7.753, c = 8.163 β = 102.52° Z=4	528.0	8.12	generated at 12.5 GPa + 1000 °C; emerald green	[34]
	[Sr8(PO4)2][(UO2)(PO4)2(B5O9)2]	1746.97	monoclinic	P21/n	a = 6.5014, b =22.4302, c =9.7964 β = 90.241° Z=2	1428.57	4.061	orange	[35]