Chemistry:Borate phosphate
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3D model (JSmol)
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ChemSpider |
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Properties | |
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 | |
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]
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] | |
CsNa2Sm2(BO3)(PO4)2 | 728.34 | orthorhombic | Cmcm | a=7.0631 b=15.288 c=10.725 Z=4 | 1158.1 | 4.177 | colourless | [21] | |
CsNa2Ho2(BO3)(PO4)2 | [22] | ||||||||
CsNa2Er2(BO3)(PO4)2 | [22] | ||||||||
CsNa2Tm2(BO3)(PO4)2 | [22] | ||||||||
CsNa2Yb2(BO3)(PO4)2 | [22] | ||||||||
CsZn4(BO3)(PO4)2 | 679.30 | orthorhombic | Pbca | a=14.49 b=10.02 c=16.45 Z=8 | 2388 | 3.779 | colourless | [23] | |
Ba3(BO3)(PO4) | hexagonal | P63mc | a=5.4898, c=14.7551, Z=2 | [1][24] | |||||
Ba3(BO3)(PO4) | monoclinic | P2/m | a = 11.7947, b = 9.6135, c = 12.9548, β= 111.25° | 1369.08 | [25] | ||||
Ba11B26O44(PO4)2(OH)6 | monoclinic | P21/c | a=6.891, b=13.629, c=25.851, β=90.04° | [26] | |||||
Ba3(ZnB5O10)PO4 | 786.41 | orthorhombic | Pnm21 | a = 10.399 b = 7.064 c = 8.204 Z=2 | 602.6 | 4.334 | [27] | ||
La7O6(BO3)(PO4)2 | monoclinic | a=7.019 b=17.915 c=12.653 β=97.52 | 1577.27 | [1][28] | |||||
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][29] | |||
Nd7O6(BO3)(PO4)2 | monoclinic | a=6.862 b=17.591 c=12.375 β=97.18 | 1482.12 | [1][28] | |||||
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][29] | |||
Gd7O6(BO3)(PO4)2 | monoclinic | a=6.704 b=17.299 c=12.100 β=96.94 | 1393.11 | [1][28] | |||||
Dy7O6(BO3)(PO4)2 | monoclinic | a=6.623 b=17.172 c=11.960 β=96.76 | 1350.84 | [1][28] | |||||
K3Yb[OB(OH)2]2[HOPO3]2 | R3_ | a=5.6809, c=36.594 Z=3 | 1022.8 | [1][30] | |||||
K3Lu[OB(OH)2]2[HOPO3]2 | R3_ | a=5.6668, c=36.692 Z=3 | 1020.4 | [1][30] | |||||
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] |
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 Huang, Shengshi; Yu, Hongwei; Han, Jian; Pan, Shilie; Jing, Qun; Wang, Ying; Dong, Lingyun; Wu, Hongping et al. (August 2014). "The Effect of the Ratio of [M/(B+P) on the Configuration of Anionic Groups: Synthesis of the Borate-Phosphate LiPb 4 (BO 3 )(PO 4 ) 2"] (in en). European Journal of Inorganic Chemistry 2014 (22): 3467–3473. doi:10.1002/ejic.201402389. http://doi.wiley.com/10.1002/ejic.201402389.
- ↑ Kim, Danny H.; Marbois, Beth N.; Faull, Kym F.; Eckhert, Curtis D. (June 2003). "Esterification of borate with NAD+ and NADH as studied by electrospray ionization mass spectrometry and11B NMR spectroscopy". Journal of Mass Spectrometry 38 (6): 632–640. doi:10.1002/jms.476. PMID 12827632. Bibcode: 2003JMSp...38..632K.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 Yilmaz, Aysen; Bu, Xianhui; Kizilyalli, Meral; Kniep, Rudiger; Stucky, Galen D. (February 2001). "Cobalt Borate Phosphate, Co3[BPO7, Synthesis and Characterization"] (in en). Journal of Solid State Chemistry 156 (2): 281–285. doi:10.1006/jssc.2000.8963. Bibcode: 2001JSSCh.156..281Y. https://linkinghub.elsevier.com/retrieve/pii/S0022459600989631.
- ↑ He, Zhangzhen; Moriyama, Hiroshi (2003). "A Model of New VUV NLO Materials Based on Borate: A Novel Noncentrosymmetric Borophosphate Compound Be 3 BPO 7" (in en). MRS Proceedings 788: L8.23. doi:10.1557/PROC-788-L8.23. ISSN 0272-9172. http://link.springer.com/10.1557/PROC-788-L8.23.
- ↑ 5.0 5.1 5.2 Gözel, G.; Baykal, A.; Kizilyalli, M.; Kniep, R. (December 1998). "Solid-State Synthesis, X-ray Powder Investigation and IR Study of α-Mg3[BPO7"] (in en). Journal of the European Ceramic Society 18 (14): 2241–2246. doi:10.1016/S0955-2219(98)00152-6. https://linkinghub.elsevier.com/retrieve/pii/S0955221998001526.
- ↑ "Lüneburgite". https://www.mindat.org/min-2458.html.
- ↑ Korybska-Sadło, Iwona; Sitarz, Maciej; Król, Magdalena; Gunia, Piotr (2016-10-20). "Vibrational spectroscopic characterization of the magnesium borate-phosphate mineral lüneburgite" (in en). Spectroscopy Letters 49 (9): 606–612. doi:10.1080/00387010.2016.1236819. ISSN 0038-7010. Bibcode: 2016SpecL..49..606K. https://www.tandfonline.com/doi/full/10.1080/00387010.2016.1236819.
- ↑ "Seamanite". https://www.mindat.org/min-3599.html.
- ↑ Ewald, Bastian; Huang, Ya-Xi; Kniep, Rüdiger (August 2007). "Structural Chemistry of Borophosphates, Metalloborophosphates, and Related Compounds" (in de). Zeitschrift für anorganische und allgemeine Chemie 633 (10): 1517–1540. doi:10.1002/zaac.200700232. http://doi.wiley.com/10.1002/zaac.200700232.
- ↑ "Laptevite-(Ce)". https://www.mindat.org/min-42866.html.
- ↑ Lin, Zhuojia; Wragg, David S.; Lightfoot, Philip; Morris, Russell E. (2009). "A novel non-centrosymmetric metallophosphate-borate compound via ionothermal synthesis" (in en). Dalton Transactions (27): 5287–9. doi:10.1039/b904450g. ISSN 1477-9226. PMID 19565080. http://xlink.rsc.org/?DOI=b904450g.
- ↑ Bluhm, K.; Park, C. H. (1997-01-01). "Die Synthese und Kristallstruktur des Borat-Phosphats: α -Zn3(BO3)(PO4) / Synthesis and Crystal Structure of the Borate-Phosphate: α-Zn3(BO3)( PO4)". Zeitschrift für Naturforschung B 52 (1): 102–106. doi:10.1515/znb-1997-0120. ISSN 1865-7117. https://www.degruyter.com/document/doi/10.1515/znb-1997-0120/html.
- ↑ Zhang, Erpan; Zhao, Sangen; Zhang, Jianxiu; Fu, Peizhen; Yao, Jiyong (2011-01-15). "The β-modification of trizinc borate phosphate, Zn 3 (BO 3 )(PO 4 )". Acta Crystallographica Section E 67 (1): i3. doi:10.1107/S1600536810051871. ISSN 1600-5368. PMID 21522511. PMC 3050272. Bibcode: 2011AcCrE..67I...3Z. http://scripts.iucr.org/cgi-bin/paper?S1600536810051871.
- ↑ Tekin, Berna (August 2007). "Bazi Metal İçeren Boratli, Fosfatli ve Borfosfatli Bi̇leşi̇kleri̇n Sentezi̇ ve Yapisal Karakteri̇zasyonu". http://dspace.balikesir.edu.tr/xmlui/bitstream/handle/20.500.12462/1562/Berna_Tekin.pdf?sequence=1&isAllowed=y.
- ↑ Chen, Shuang; Hoffmann, Stefan; Carrillo-Cabrera, Wilder; Akselrud, Lev G.; Prots, Yurii; Schwarz, Ulrich; Zhao, Jing-Tai; Kniep, Rüdiger (March 2010). "Sr10[(PO4)5.5(BO4)0.5(BO2): Growth and crystal structure of a strontium phosphate orthoborate metaborate closely related to the apatite-type crystal structure"] (in en). Journal of Solid State Chemistry 183 (3): 658–661. doi:10.1016/j.jssc.2009.12.026. Bibcode: 2010JSSCh.183..658C. https://linkinghub.elsevier.com/retrieve/pii/S0022459609005982.
- ↑ Gou, Wenbin; He, Zhangzhen; Yang, Ming; Zhang, Weilong; Cheng, Wendan (2013-03-04). "Synthesis and Magnetic Properties of a New Borophosphate SrCo 2 BPO 7 with a Four-Column Ribbon Structure" (in en). Inorganic Chemistry 52 (5): 2492–2496. doi:10.1021/ic3023979. ISSN 0020-1669. PMID 23406089. https://pubs.acs.org/doi/10.1021/ic3023979.
- ↑ "Byzantievite". https://www.mindat.org/min-37645.html.
- ↑ Sokolova, E.; Hawthorne, F. C.; Pautov, L. A.; Agakhanov, A. A. (April 2010). "Byzantievite, Ba 5 (Ca, REE ,Y) 22 (Ti,Nb) 18 (SiO 4 ) 4 [(PO 4 ),(SiO 4 ) 4 (BO 3 ) 9 O 21 [(OH),F] 43 (H 2 O) 1.5 : the crystal structure and crystal chemistry of the only known mineral with the oxyanions (BO 3 ), (SiO 4 ) and (PO 4 )"] (in en). Mineralogical Magazine 74 (2): 285–308. doi:10.1180/minmag.2010.074.2.285. ISSN 0026-461X. Bibcode: 2010MinM...74..285S. https://www.cambridge.org/core/product/identifier/S0026461X00055985/type/journal_article.
- ↑ "Rhabdoborite-(V)". https://www.mindat.org/min-52886.html.
- ↑ Zhao, Dan; Xue, Yali; Zhang, Ruijuan; Fan, Yanping; Liu, Baozhong; Li, Yanan; Zhang, Shirui (2020). "Design, synthesis, crystal structure and luminescent properties introduced by Eu 3+ of a new type of rare-earth borophosphate CsNa 2 REE 2 (BO 3 )(PO 4 ) 2 (REE = Y, Gd)" (in en). Dalton Transactions 49 (29): 10104–10113. doi:10.1039/D0DT00389A. ISSN 1477-9226. PMID 32662492. http://xlink.rsc.org/?DOI=D0DT00389A.
- ↑ Zhao, Dan; Shi, Lin-Ying; Zhang, Rui-Juan; Xue, Ya-Li (2020-12-01). "Synthesis, crystal structure and luminescence properties of a new samarium borate phosphate, CsNa 2 Sm 2 (BO 3 )(PO 4 ) 2". Acta Crystallographica Section C: Structural Chemistry 76 (12): 1068–1075. doi:10.1107/S2053229620014576. ISSN 2053-2296. PMID 33273144. https://scripts.iucr.org/cgi-bin/paper?S2053229620014576.
- ↑ 22.0 22.1 22.2 22.3 Zhao, Dan; Xue, Ya-Li; Fan, Yun-Chang; Zhang, Rui-Juan; Zhang, Shi-Rui (June 2021). "A new series of rare-earth borate-phosphate family CsNa2Ln2(BO3)(PO4)2 (Ln = Ho, Er, Tm, Yb): Tunnel structure, upconversion luminescence and optical thermometry properties" (in en). Journal of Alloys and Compounds 866: 158801. doi:10.1016/j.jallcom.2021.158801. https://linkinghub.elsevier.com/retrieve/pii/S0925838821002085.
- ↑ Guo, Fengjiao; Hu, Cong; Wang, Ying; Han, Jian; Yang, Zhihua; Pan, Shilie (2018). "Insights of BO 3 –PO 4 replacement for the design and synthesis of a new borate–phosphate with unique 1∞[Zn 4 BO 11 chains and two new phosphates"] (in en). Inorganic Chemistry Frontiers 5 (2): 327–334. doi:10.1039/C7QI00548B. ISSN 2052-1553. http://xlink.rsc.org/?DOI=C7QI00548B.
- ↑ Ma, H.W.; Liang, J.K.; Wu, L.; Liu, G.Y.; Rao, G.H.; Chen, X.L. (October 2004). "Ab initio structure determination of new compound Ba3(BO3)(PO4)" (in en). Journal of Solid State Chemistry 177 (10): 3454–3459. doi:10.1016/j.jssc.2003.12.027. Bibcode: 2004JSSCh.177.3454M. https://linkinghub.elsevier.com/retrieve/pii/S0022459603006777.
- ↑ Gözel, Güller (1993). "Preparation and structural investigation of alkaline-earth metal borophosphates – Tez Arşivi". https://tezarsivi.com/preparation-and-structural-investigation-of-alkaline-earth-metal-borophosphates.
- ↑ Heyward, Carla; McMillen, Colin D.; Kolis, Joseph (July 2013). "Hydrothermal synthesis and structural analysis of new mixed oxyanion borates: Ba11B26O44(PO4)2(OH)6, Li9BaB15O27(CO3) and Ba3Si2B6O16" (in en). Journal of Solid State Chemistry 203: 166–173. doi:10.1016/j.jssc.2013.04.022. Bibcode: 2013JSSCh.203..166H. https://linkinghub.elsevier.com/retrieve/pii/S0022459613002168.
- ↑ Yu, Hongwei; Zhang, Weiguo; Young, Joshua; Rondinelli, James M.; Halasyamani, P. Shiv (December 2015). "Design and Synthesis of the Beryllium-Free Deep-Ultraviolet Nonlinear Optical Material Ba 3 (ZnB 5 O 10 )PO 4" (in en). Advanced Materials 27 (45): 7380–7385. doi:10.1002/adma.201503951. PMID 26459262. Bibcode: 2015AdM....27.7380Y. http://doi.wiley.com/10.1002/adma.201503951.
- ↑ 28.0 28.1 28.2 28.3 Shi, Ying; Liang, Jingkui; Zhang, Hao; Yang, Jinling; Zhuang, Weidong; Rao, Guanghui (February 1997). "X-Ray Powder Diffraction and Vibrational Spectra Studies of Rare Earth Borophosphates,Ln7O6(BO3)(PO4)2(Ln=La, Nd, Gd, and Dy)" (in en). Journal of Solid State Chemistry 129 (1): 45–52. doi:10.1006/jssc.1996.7227. Bibcode: 1997JSSCh.129...45S. https://linkinghub.elsevier.com/retrieve/pii/S0022459696972278.
- ↑ 29.0 29.1 Ewald, B.; Prots, Yu.; Kniep, R. (April 2004). "Refinement of the crystal structures of praseodymium- and samariumoxoborate- bis(oxophosphate)-oxide, Ln7O6[BO3][PO4]2, (Ln = Pr, Sm)". Zeitschrift für Kristallographie – New Crystal Structures 219 (1–4): 233–235. doi:10.1524/ncrs.2004.219.14.233. ISSN 2197-4578.
- ↑ 30.0 30.1 Zhou, Yan; Hoffmann, Stefan; Huang, Ya-Xi; Prots, Yurii; Schnelle, Walter; Menezes, Prashanth W.; Carrillo-Cabrera, Wilder; Sichelschmidt, Jörg et al. (June 2011). "K3Ln[OB(OH)22[HOPO3]2 (Ln=Yb, Lu): Layered rare-earth dihydrogen borate monohydrogen phosphates"] (in en). Journal of Solid State Chemistry 184 (6): 1517–1522. doi:10.1016/j.jssc.2011.04.023. Bibcode: 2011JSSCh.184.1517Z. https://linkinghub.elsevier.com/retrieve/pii/S0022459611001915.
- ↑ 31.0 31.1 Wang, Ying; Pan, Shilie; Huang, Shengshi; Dong, Lingyun; Zhang, Min; Han, Shujuan; Wang, Xian (2014). "Structural insights for the design of new borate–phosphates: synthesis, crystal structure and optical properties of Pb 4 O(BO 3 )(PO 4 ) and Bi 4 O 3 (BO 3 )(PO 4 )" (in en). Dalton Trans. 43 (34): 12886–12893. doi:10.1039/C4DT01199F. ISSN 1477-9226. PMID 25020047. http://xlink.rsc.org/?DOI=C4DT01199F.
- ↑ Lipp, C.; Burns, P. C. (2011-10-01). "Th2[BO4[PO4]: A RARE EXAMPLE OF AN ACTINIDE BORATE-PHOSPHATE"] (in en). The Canadian Mineralogist 49 (5): 1211–1220. doi:10.3749/canmin.49.5.1211. ISSN 0008-4476. Bibcode: 2011CaMin..49.1211L. http://www.canmin.org/cgi/doi/10.3749/canmin.49.5.1211.
- ↑ Wu, Shijun; Wang, Shuao; Diwu, Juan; Depmeier, Wulf; Malcherek, Thomas; Alekseev, Evgeny V.; Albrecht-Schmitt, Thomas E. (2012). "Complex clover cross-sectioned nanotubules exist in the structure of the first uranium borate phosphate" (in en). Chemical Communications 48 (29): 3479–81. doi:10.1039/c2cc17517g. ISSN 1359-7345. PMID 22267020. http://xlink.rsc.org/?DOI=c2cc17517g.
- ↑ Hinteregger, Ernst; Wurst, Klaus; Perfler, Lukas; Kraus, Florian; Huppertz, Hubert (2013-10-14). "High-Pressure Synthesis and Characterization of the Actinide Borate Phosphate U 2 [BO 4 [PO 4 ]: High-Pressure Synthesis and Characterization of U 2 [BO 4 ][PO 4 ]"] (in en). European Journal of Inorganic Chemistry 2013 (30): 5247–5252. doi:10.1002/ejic.201300662. PMID 24611029.
- ↑ Hao, Yucheng (2017). "New Insight into the Crystal Chemistry of Uranium and Thorium Borates, Borophosphates and Borate-phosphates". p. 109. https://d-nb.info/1169830692/34.
Original source: https://en.wikipedia.org/wiki/Borate phosphate.
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