Dipotassium tetra­hydroxido­penta­oxido­tetra­borate monohydrate

In the tetra­borate anion of the title compound, K₂[B₄O₅(OH)₄]·H₂O, the bridging B—O bond lengths of the tetra­hedral BO₄ and the trigonal-planar BO₃ units are slightly longer than the corresponding terminal B—OH bond lengths. The crystal structure is stabilized by inter­molecular O—H...O, O—H...O_water and O_water—H...O hydrogen bonds, generating a three-dimensional network. The two potassium cations both show a coordination number of 9.

Key indicators

• Single-crystal X-ray study
• T = 296 K
• Mean [sigma](O-B) = 0.003 Å
• R factor = 0.029
• wR factor = 0.073
• Data-to-parameter ratio = 10.5

checkCIF/PLATON results

No syntax errors found



Alert level C
PLAT911_ALERT_3_C Missing FCF Refl Between Thmin & STh/L=    0.600          7 Report

Alert level G
PLAT002_ALERT_2_G Number of Distance or Angle Restraints on AtSite         11 Note
PLAT172_ALERT_4_G The CIF-Embedded .res File Contains DFIX Records          4 Report
PLAT860_ALERT_3_G Number of Least-Squares Restraints .............          8 Note
PLAT899_ALERT_4_G SHELXL97   is Deprecated and Succeeded by SHELXL       2018 Note
PLAT912_ALERT_4_G Missing # of FCF Reflections Above STh/L=  0.600         11 Note
PLAT913_ALERT_3_G Missing # of Very Strong Reflections in FCF ....          3 Note

   0 ALERT level A = Most likely a serious problem - resolve or explain
   0 ALERT level B = A potentially serious problem, consider carefully
   1 ALERT level C = Check. Ensure it is not caused by an omission or oversight
   6 ALERT level G = General information/check it is not something unexpected

   0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   1 ALERT type 2 Indicator that the structure model may be wrong or deficient
   3 ALERT type 3 Indicator that the structure quality may be low
   3 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check

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Computing details

Data collection: APEX3 (Bruker, 2014); cell refinement: SAINT (Bruker, 2014); data reduction: SAINT (Bruker, 2014); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2014/7 (Sheldrick, 2015); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and PLATON (Spek, 2009); software used to prepare material for publication: publCIF (Westrip, 2010).

Dipotassium tetrahydroxidopentaoxidotetraborate monohydrate

Crystal data

K2(B4O5(OH)4)·H2O	Z = 2
Mr = 287.49	F(000) = 288
Triclinic, P1	Dx = 2.100 Mg m^−3
a = 7.1850 (6) Å	Cu Kα radiation, λ = 1.54178 Å
b = 7.8479 (7) Å	Cell parameters from 9535 reflections
c = 8.9932 (8) Å	θ = 5.3–72.9°
α = 68.572 (1)°	µ = 9.68 mm^−1
β = 88.393 (2)°	T = 296 K
γ = 74.975 (1)°	Block, colourless
V = 454.66 (7) Å^3	0.15 × 0.15 × 0.10 mm

Data collection

Bruker APEX3 CMOS diffractometer	1685 reflections with I > 2σ(I)
Radiation source: micro-focus sealed tube	Rint = 0.048
ω and φ scan	θmax = 72.5°, θmin = 5.3°
Absorption correction: multi-scan (SADABS; Bruker, 2014)	h = −8→8
Tmin = 0.428, Tmax = 0.755	k = −9→9
12205 measured reflections	l = −11→11
1782 independent reflections

Refinement

Refinement on F^2	8 restraints
Least-squares matrix: full	Hydrogen site location: difference Fourier map
R[F^2 > 2σ(F^2)] = 0.029	All H-atom parameters refined
wR(F^2) = 0.073	w = 1/[σ^2(Fo^2) + (0.0364P)^2 + 0.3324P] where P = (Fo^2 + 2Fc^2)/3
S = 1.08	(Δ/σ)max < 0.001
1782 reflections	Δρmax = 0.26 e Å^−3
169 parameters	Δρmin = −0.41 e Å^−3

Special details

Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.

Refinement. The O-bound hydrogen atoms were located in a difference Fourier map and were refined with distance restraints of O—H = 0.85 (2) Å.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Ų)

	x	y	z	Uiso*/Ueq
K1	−0.09251 (7)	0.38216 (6)	0.80053 (5)	0.02243 (14)
K2	0.20676 (6)	1.09022 (6)	0.19990 (5)	0.02022 (13)
O1	0.30645 (19)	0.80307 (18)	0.52405 (15)	0.0163 (3)
O2	0.0185 (2)	0.7652 (2)	0.44414 (18)	0.0278 (4)
O3	0.11229 (19)	0.64763 (19)	0.72235 (16)	0.0170 (3)
O4	0.2514 (2)	0.44850 (18)	0.98578 (16)	0.0165 (3)
O5	0.20264 (19)	0.78980 (17)	0.89638 (15)	0.0147 (3)
O6	0.45190 (18)	0.59912 (16)	0.78995 (15)	0.0118 (3)
O7	0.2574 (2)	1.07780 (19)	0.88399 (17)	0.0193 (3)
O8	0.40972 (19)	0.93391 (17)	0.70523 (15)	0.0148 (3)
O9	0.64504 (19)	0.74772 (18)	0.58708 (16)	0.0167 (3)
O10	0.5427 (3)	0.2666 (2)	0.75091 (19)	0.0276 (4)
B1	0.1486 (3)	0.7371 (3)	0.5679 (3)	0.0154 (4)
B2	0.2586 (3)	0.6167 (3)	0.8510 (2)	0.0125 (4)
B3	0.2906 (3)	0.9315 (3)	0.8275 (2)	0.0127 (4)
B4	0.4565 (3)	0.7673 (3)	0.6519 (2)	0.0111 (4)
H9	0.620 (3)	0.843 (3)	0.504 (2)	0.030 (7)*
H4	0.351 (3)	0.420 (4)	1.043 (3)	0.036 (8)*
H2	−0.076 (3)	0.735 (4)	0.482 (4)	0.049 (9)*
H10A	0.508 (5)	0.375 (3)	0.759 (3)	0.051 (9)*
H10B	0.547 (5)	0.285 (4)	0.652 (2)	0.049 (9)*
H7	0.329 (4)	1.148 (4)	0.842 (4)	0.050 (9)*

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
K1	0.0295 (3)	0.0193 (2)	0.0218 (2)	−0.00895 (17)	0.00811 (18)	−0.01020 (17)
K2	0.0186 (2)	0.0179 (2)	0.0239 (2)	−0.00297 (16)	0.00074 (17)	−0.00873 (16)
O1	0.0168 (7)	0.0199 (6)	0.0121 (6)	−0.0072 (5)	0.0003 (5)	−0.0041 (5)
O2	0.0174 (8)	0.0495 (10)	0.0191 (8)	−0.0102 (7)	−0.0008 (6)	−0.0146 (7)
O3	0.0147 (6)	0.0228 (7)	0.0161 (6)	−0.0085 (5)	0.0008 (5)	−0.0077 (5)
O4	0.0201 (7)	0.0119 (6)	0.0162 (7)	−0.0069 (5)	0.0018 (6)	−0.0022 (5)
O5	0.0163 (6)	0.0130 (6)	0.0173 (6)	−0.0057 (5)	0.0063 (5)	−0.0078 (5)
O6	0.0130 (6)	0.0082 (5)	0.0137 (6)	−0.0025 (5)	0.0019 (5)	−0.0039 (5)
O7	0.0246 (7)	0.0152 (7)	0.0239 (7)	−0.0077 (6)	0.0081 (6)	−0.0125 (6)
O8	0.0194 (7)	0.0102 (6)	0.0169 (6)	−0.0060 (5)	0.0059 (5)	−0.0062 (5)
O9	0.0136 (7)	0.0144 (6)	0.0188 (7)	−0.0023 (5)	0.0055 (5)	−0.0037 (5)
O10	0.0435 (9)	0.0161 (7)	0.0268 (8)	−0.0075 (6)	0.0089 (7)	−0.0127 (6)
B1	0.0142 (10)	0.0179 (10)	0.0155 (10)	−0.0022 (8)	0.0007 (8)	−0.0091 (8)
B2	0.0131 (10)	0.0117 (9)	0.0127 (9)	−0.0040 (7)	0.0011 (8)	−0.0039 (7)
B3	0.0145 (10)	0.0107 (9)	0.0122 (9)	−0.0018 (7)	−0.0003 (8)	−0.0044 (7)
B4	0.0113 (9)	0.0105 (9)	0.0124 (9)	−0.0031 (7)	0.0023 (8)	−0.0051 (7)

Geometric parameters (Å, º)

K1—O3	2.7315 (14)	O4—B2	1.441 (2)
K1—O5^i	2.7608 (14)	O4—K1^i	2.7783 (14)
K1—O4^i	2.7782 (14)	O4—K2^x	2.8624 (13)
K1—O2^ii	2.8174 (16)	O4—H4	0.825 (17)
K1—O7^iii	2.8759 (15)	O5—B3	1.363 (2)
K1—O9^iv	2.9741 (14)	O5—B2	1.512 (2)
K1—O10^iv	3.0799 (18)	O5—K1^i	2.7608 (14)
K1—O6^iv	3.2608 (13)	O5—K2^ix	2.8982 (14)
K1—O4	3.2684 (14)	O6—B4	1.451 (2)
K2—O10^v	2.7938 (16)	O6—B2	1.471 (2)
K2—O8^vi	2.8461 (14)	O6—K1^xi	3.2608 (13)
K2—O4^vii	2.8624 (13)	O7—B3	1.383 (2)
K2—O7^viii	2.8877 (15)	O7—K1^xii	2.8759 (15)
K2—O5^ix	2.8982 (14)	O7—K2^xiii	2.8877 (15)
K2—O3^ix	2.9142 (15)	O7—H7	0.834 (18)
K2—O1	2.9274 (13)	O8—B3	1.372 (3)
K2—O9^vi	3.0031 (14)	O8—B4	1.508 (2)
K2—O2	3.2690 (18)	O8—K2^vi	2.8461 (14)
O1—B1	1.356 (3)	O9—B4	1.453 (2)
O1—B4	1.497 (2)	O9—K1^xi	2.9741 (14)
O2—B1	1.390 (2)	O9—K2^vi	3.0031 (14)
O2—K1^ii	2.8174 (16)	O9—H9	0.825 (17)
O2—H2	0.804 (17)	O10—K2^v	2.7939 (16)
O3—B1	1.361 (3)	O10—K1^xi	3.0799 (18)
O3—B2	1.495 (2)	O10—H10A	0.856 (17)
O3—K2^ix	2.9142 (15)	O10—H10B	0.850 (17)
O3—K1—O5^i	124.63 (4)	B1—O3—K2^ix	107.19 (11)
O3—K1—O4^i	83.56 (4)	B2—O3—K2^ix	98.46 (10)
O5^i—K1—O4^i	52.02 (4)	K1—O3—K2^ix	90.33 (4)
O3—K1—O2^ii	102.87 (5)	B2—O4—K1^i	99.00 (10)
O5^i—K1—O2^ii	127.95 (5)	B2—O4—K2^x	167.17 (11)
O4^i—K1—O2^ii	167.06 (5)	K1^i—O4—K2^x	90.48 (4)
O3—K1—O7^iii	91.40 (4)	B2—O4—K1	91.71 (10)
O5^i—K1—O7^iii	87.71 (4)	K1^i—O4—K1	109.46 (4)
O4^i—K1—O7^iii	121.96 (4)	K2^x—O4—K1	76.91 (3)
O2^ii—K1—O7^iii	69.61 (4)	B2—O4—H4	105 (2)
O3—K1—O9^iv	72.91 (4)	K1^i—O4—H4	83 (2)
O5^i—K1—O9^iv	117.88 (4)	K2^x—O4—H4	84 (2)
O4^i—K1—O9^iv	77.28 (4)	K1—O4—H4	158 (2)
O2^ii—K1—O9^iv	93.72 (4)	B3—O5—B2	118.48 (15)
O7^iii—K1—O9^iv	154.34 (4)	B3—O5—K1^i	135.06 (11)
O3—K1—O10^iv	149.75 (4)	B2—O5—K1^i	97.85 (10)
O5^i—K1—O10^iv	74.23 (4)	B3—O5—K2^ix	112.27 (11)
O4^i—K1—O10^iv	94.59 (4)	B2—O5—K2^ix	98.67 (9)
O2^ii—K1—O10^iv	74.14 (4)	K1^i—O5—K2^ix	85.04 (4)
O7^iii—K1—O10^iv	114.49 (4)	B4—O6—B2	111.10 (13)
O9^iv—K1—O10^iv	77.23 (4)	B4—O6—K1^xi	95.42 (10)
O3—K1—O6^iv	108.12 (4)	B2—O6—K1^xi	153.42 (10)
O5^i—K1—O6^iv	75.04 (4)	B3—O7—K1^xii	122.95 (11)
O4^i—K1—O6^iv	55.28 (4)	B3—O7—K2^xiii	132.83 (12)
O2^ii—K1—O6^iv	111.80 (4)	K1^xii—O7—K2^xiii	83.18 (4)
O7^iii—K1—O6^iv	159.03 (4)	B3—O7—H7	110 (2)
O9^iv—K1—O6^iv	44.97 (3)	K1^xii—O7—H7	95 (2)
O10^iv—K1—O6^iv	49.71 (4)	K2^xiii—O7—H7	106 (2)
O3—K1—O4	45.69 (3)	B3—O8—B4	118.94 (14)
O5^i—K1—O4	85.16 (4)	B3—O8—K2^vi	111.12 (11)
O4^i—K1—O4	70.54 (5)	B4—O8—K2^vi	97.89 (10)
O2^ii—K1—O4	121.96 (4)	B4—O9—K1^xi	108.04 (10)
O7^iii—K1—O4	65.58 (4)	B4—O9—K2^vi	92.77 (10)
O9^iv—K1—O4	111.87 (4)	K1^xi—O9—K2^vi	84.16 (4)
O10^iv—K1—O4	159.30 (4)	B4—O9—H9	99.7 (15)
O6^iv—K1—O4	123.31 (3)	K1^xi—O9—H9	152.0 (16)
O10^v—K2—O8^vi	68.19 (4)	K2^vi—O9—H9	98.6 (18)
O10^v—K2—O4^vii	126.34 (5)	K2^v—O10—K1^xi	85.71 (5)
O8^vi—K2—O4^vii	78.89 (4)	K2^v—O10—H10A	155 (2)
O10^v—K2—O7^viii	74.82 (4)	K1^xi—O10—H10A	72 (2)
O8^vi—K2—O7^viii	100.77 (4)	K2^v—O10—H10B	85 (2)
O4^vii—K2—O7^viii	71.12 (4)	K1^xi—O10—H10B	99 (2)
O10^v—K2—O5^ix	126.21 (4)	H10A—O10—H10B	108 (2)
O8^vi—K2—O5^ix	165.60 (4)	O1—B1—O3	124.20 (17)
O4^vii—K2—O5^ix	90.65 (4)	O1—B1—O2	116.26 (18)
O7^viii—K2—O5^ix	84.92 (4)	O3—B1—O2	119.54 (18)
O10^v—K2—O3^ix	154.22 (5)	O1—B1—K2	52.28 (9)
O8^vi—K2—O3^ix	118.33 (4)	O3—B1—K2	162.79 (13)
O4^vii—K2—O3^ix	78.91 (4)	O2—B1—K2	66.91 (11)
O7^viii—K2—O3^ix	124.27 (4)	O1—B1—K2^ix	123.52 (12)
O5^ix—K2—O3^ix	49.06 (3)	O3—B1—K2^ix	51.40 (9)
O10^v—K2—O1	59.69 (4)	O2—B1—K2^ix	95.47 (12)
O8^vi—K2—O1	71.95 (4)	K2—B1—K2^ix	114.13 (6)
O4^vii—K2—O1	144.45 (4)	O4—B2—O6	111.51 (14)
O7^viii—K2—O1	133.55 (4)	O4—B2—O3	108.42 (14)
O5^ix—K2—O1	113.64 (4)	O6—B2—O3	110.00 (15)
O3^ix—K2—O1	97.25 (4)	O4—B2—O5	110.66 (15)
O10^v—K2—O9^vi	108.20 (4)	O6—B2—O5	109.36 (14)
O8^vi—K2—O9^vi	48.87 (4)	O3—B2—O5	106.78 (14)
O4^vii—K2—O9^vi	75.56 (4)	O4—B2—K1^i	55.65 (9)
O7^viii—K2—O9^vi	138.95 (4)	O6—B2—K1^i	133.31 (11)
O5^ix—K2—O9^vi	119.08 (4)	O3—B2—K1^i	116.64 (12)
O3^ix—K2—O9^vi	70.02 (4)	O5—B2—K1^i	55.37 (8)
O1—K2—O9^vi	70.06 (4)	O4—B2—K2^ix	103.66 (11)
O10^v—K2—O2	71.45 (5)	O6—B2—K2^ix	144.84 (11)
O8^vi—K2—O2	115.02 (4)	O3—B2—K2^ix	56.29 (8)
O4^vii—K2—O2	161.79 (4)	O5—B2—K2^ix	55.77 (8)
O7^viii—K2—O2	115.01 (4)	K1^i—B2—K2^ix	68.57 (4)
O5^ix—K2—O2	73.42 (4)	O5—B3—O8	122.62 (16)
O3^ix—K2—O2	83.88 (4)	O5—B3—O7	118.18 (18)
O1—K2—O2	43.80 (4)	O8—B3—O7	119.19 (17)
O9^vi—K2—O2	104.13 (4)	O5—B3—K2^vi	129.93 (12)
B1—O1—B4	118.49 (15)	O8—B3—K2^vi	47.92 (9)
B1—O1—K2	106.22 (11)	O7—B3—K2^vi	92.06 (11)
B4—O1—K2	132.16 (10)	O6—B4—O9	111.38 (14)
B1—O2—K1^ii	126.73 (13)	O6—B4—O1	110.21 (14)
B1—O2—K2	90.06 (12)	O9—B4—O1	109.12 (15)
K1^ii—O2—K2	81.83 (4)	O6—B4—O8	107.72 (14)
B1—O2—H2	109 (2)	O9—B4—O8	109.87 (14)
K1^ii—O2—H2	105 (2)	O1—B4—O8	108.48 (14)
K2—O2—H2	149 (2)	O6—B4—K2^vi	99.24 (10)
B1—O3—B2	117.57 (15)	O9—B4—K2^vi	61.95 (9)
B1—O3—K1	121.32 (11)	O1—B4—K2^vi	150.20 (12)
B2—O3—K1	114.18 (10)	O8—B4—K2^vi	56.04 (8)
B4—O1—B1—O3	3.3 (3)	B3—O5—B2—O4	145.94 (16)
K2—O1—B1—O3	−159.13 (16)	K1^i—O5—B2—O4	−6.65 (15)
B4—O1—B1—O2	−176.73 (16)	K2^ix—O5—B2—O4	−92.79 (13)
K2—O1—B1—O2	20.86 (19)	B3—O5—B2—O6	22.7 (2)
B4—O1—B1—K2	162.41 (17)	K1^i—O5—B2—O6	−129.86 (12)
B4—O1—B1—K2^ix	66.24 (18)	K2^ix—O5—B2—O6	144.00 (11)
K2—O1—B1—K2^ix	−96.17 (11)	B3—O5—B2—O3	−96.26 (18)
B2—O3—B1—O1	−1.4 (3)	K1^i—O5—B2—O3	111.15 (12)
K1—O3—B1—O1	−150.56 (14)	K2^ix—O5—B2—O3	25.01 (14)
K2^ix—O3—B1—O1	108.18 (18)	B3—O5—B2—K1^i	152.59 (16)
B2—O3—B1—O2	178.60 (16)	K2^ix—O5—B2—K1^i	−86.14 (5)
K1—O3—B1—O2	29.4 (2)	B3—O5—B2—K2^ix	−121.27 (15)
K2^ix—O3—B1—O2	−71.82 (19)	K1^i—O5—B2—K2^ix	86.14 (5)
B2—O3—B1—K2	−73.6 (5)	B2—O5—B3—O8	8.0 (2)
K1—O3—B1—K2	137.3 (4)	K1^i—O5—B3—O8	147.81 (13)
K2^ix—O3—B1—K2	36.0 (5)	K2^ix—O5—B3—O8	−106.03 (16)
B2—O3—B1—K2^ix	−109.58 (15)	B2—O5—B3—O7	−171.96 (15)
K1—O3—B1—K2^ix	101.26 (11)	K1^i—O5—B3—O7	−32.2 (2)
K1^ii—O2—B1—O1	62.0 (2)	K2^ix—O5—B3—O7	73.99 (17)
K2—O2—B1—O1	−17.83 (16)	B2—O5—B3—K2^vi	−51.8 (2)
K1^ii—O2—B1—O3	−118.01 (17)	K1^i—O5—B3—K2^vi	87.94 (18)
K2—O2—B1—O3	162.16 (16)	K2^ix—O5—B3—K2^vi	−165.90 (8)
K1^ii—O2—B1—K2	79.83 (12)	B4—O8—B3—O5	−4.2 (2)
K1^ii—O2—B1—K2^ix	−166.25 (9)	K2^vi—O8—B3—O5	−116.66 (16)
K2—O2—B1—K2^ix	113.93 (5)	B4—O8—B3—O7	175.75 (15)
K1^i—O4—B2—O6	128.59 (12)	K2^vi—O8—B3—O7	63.32 (18)
K2^x—O4—B2—O6	−94.2 (5)	B4—O8—B3—K2^vi	112.44 (15)
K1—O4—B2—O6	−121.41 (13)	K1^xii—O7—B3—O5	−77.59 (19)
K1^i—O4—B2—O3	−110.17 (13)	K2^xiii—O7—B3—O5	36.5 (2)
K2^x—O4—B2—O3	27.0 (6)	K1^xii—O7—B3—O8	102.43 (17)
K1—O4—B2—O3	−0.16 (13)	K2^xiii—O7—B3—O8	−143.50 (13)
K1^i—O4—B2—O5	6.62 (14)	K1^xii—O7—B3—K2^vi	144.00 (8)
K2^x—O4—B2—O5	143.8 (5)	K2^xiii—O7—B3—K2^vi	−101.93 (13)
K1—O4—B2—O5	116.63 (12)	B2—O6—B4—O9	−177.72 (14)
K2^x—O4—B2—K1^i	137.2 (5)	K1^xi—O6—B4—O9	3.91 (14)
K1—O4—B2—K1^i	110.00 (6)	B2—O6—B4—O1	−56.45 (18)
K1^i—O4—B2—K2^ix	−51.57 (8)	K1^xi—O6—B4—O1	125.17 (12)
K2^x—O4—B2—K2^ix	85.6 (5)	B2—O6—B4—O8	61.73 (17)
K1—O4—B2—K2^ix	58.43 (6)	K1^xi—O6—B4—O8	−116.65 (12)
B4—O6—B2—O4	178.63 (13)	B2—O6—B4—K2^vi	118.90 (12)
K1^xi—O6—B2—O4	−5.0 (3)	K1^xi—O6—B4—K2^vi	−59.48 (6)
B4—O6—B2—O3	58.31 (18)	K1^xi—O9—B4—O6	−4.49 (16)
K1^xi—O6—B2—O3	−125.31 (19)	K2^vi—O9—B4—O6	−89.24 (13)
B4—O6—B2—O5	−58.66 (18)	K1^xi—O9—B4—O1	−126.38 (11)
K1^xi—O6—B2—O5	117.7 (2)	K2^vi—O9—B4—O1	148.87 (11)
B4—O6—B2—K1^i	−118.89 (15)	K1^xi—O9—B4—O8	114.80 (12)
K1^xi—O6—B2—K1^i	57.5 (3)	K2^vi—O9—B4—O8	30.05 (13)
B4—O6—B2—K2^ix	−1.1 (3)	K1^xi—O9—B4—K2^vi	84.75 (6)
K1^xi—O6—B2—K2^ix	175.28 (8)	B1—O1—B4—O6	25.8 (2)
B1—O3—B2—O4	−151.09 (16)	K2—O1—B4—O6	−177.26 (9)
K1—O3—B2—O4	0.22 (18)	B1—O1—B4—O9	148.38 (15)
K2^ix—O3—B2—O4	94.41 (13)	K2—O1—B4—O9	−54.66 (19)
B1—O3—B2—O6	−28.9 (2)	B1—O1—B4—O8	−91.93 (18)
K1—O3—B2—O6	122.39 (12)	K2—O1—B4—O8	65.03 (19)
K2^ix—O3—B2—O6	−143.42 (11)	B1—O1—B4—K2^vi	−145.0 (2)
B1—O3—B2—O5	89.65 (19)	K2—O1—B4—K2^vi	12.0 (3)
K1—O3—B2—O5	−119.05 (12)	B3—O8—B4—O6	−30.2 (2)
K2^ix—O3—B2—O5	−24.85 (14)	K2^vi—O8—B4—O6	89.31 (12)
B1—O3—B2—K1^i	148.80 (13)	B3—O8—B4—O9	−151.68 (15)
K1—O3—B2—K1^i	−59.89 (12)	K2^vi—O8—B4—O9	−32.19 (14)
K2^ix—O3—B2—K1^i	34.30 (10)	B3—O8—B4—O1	89.11 (18)
B1—O3—B2—K2^ix	114.50 (15)	K2^vi—O8—B4—O1	−151.40 (11)
K1—O3—B2—K2^ix	−94.20 (8)	B3—O8—B4—K2^vi	−119.49 (15)

Symmetry codes: (i) −x, −y+1, −z+2; (ii) −x, −y+1, −z+1; (iii) x, y−1, z; (iv) x−1, y, z; (v) −x+1, −y+1, −z+1; (vi) −x+1, −y+2, −z+1; (vii) x, y+1, z−1; (viii) x, y, z−1; (ix) −x, −y+2, −z+1; (x) x, y−1, z+1; (xi) x+1, y, z; (xii) x, y+1, z; (xiii) x, y, z+1.

Hydrogen-bond geometry (Å, º)

D—H···A	D—H	H···A	D···A	D—H···A
O9—H9···O8^vi	0.83 (2)	2.02 (2)	2.8385 (18)	173 (2)
O4—H4···O6^xiv	0.83 (2)	2.03 (2)	2.8338 (18)	164 (3)
O2—H2···O9^iv	0.80 (2)	2.19 (2)	2.957 (2)	161 (3)
O10—H10A···O6	0.86 (2)	1.82 (2)	2.6704 (18)	175 (3)
O10—H10B···O1^v	0.85 (2)	2.10 (2)	2.850 (2)	146 (3)
O7—H7···O10^xii	0.83 (2)	2.00 (2)	2.823 (2)	169 (3)

Symmetry codes: (iv) x−1, y, z; (v) −x+1, −y+1, −z+1; (vi) −x+1, −y+2, −z+1; (xii) x, y+1, z; (xiv) −x+1, −y+1, −z+2.