The triclinic form of dipotassium cobalt(II) bis­(dihydrogendiphosphate) dihydrate

Lamhamdi, A.; Essehli, R.; El Bali, B.; Dušek, M.; Fejfarová, K.

doi:10.1107/S1600536811016345

inorganic compounds

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Volume 67| Part 6| June 2011| Pages i37-i38

doi:10.1107/S1600536811016345

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The triclinic form of dipotassium cobalt(II) bis(dihydrogendiphosphate) dihydrate

Abdellatif Lamhamdi,^a Rachid Essehli,^a Brahim El Bali,^a ^* Michal Dušek ^b and Karla Fejfarová ^b

^aLaboratory of Mineral Solid and Analytical Chemistry (LCSMA), Department of Chemistry, Faculty of Sciences, University Mohamed I, PO Box 717, 60000 Oujda, Morocco, and ^bInstitute of Physics of the ASCR, v.v.i., Na Slovance 2, 182 21 Praha 8, Czech Republic
^*Correspondence e-mail: b.elbali@fso.ump.ma

(Received 13 April 2011; accepted 29 April 2011; online 20 May 2011)

In the title compound, K₂Co(H₂P₂O₇)₂·2H₂O, the octahedrally coordinated Co²⁺ ion lies on an inversion centre. Two bidentate dihydrogendiphosphate anions form the equatorial plane of the [CoO₆] octahedron which is completed by two water molecules in axial positions. This results in isolated {Co(H₂O)₂[H₂P₂O₇]₂}⁴⁻ entities linked into a three-dimensional network through K—O bonds and O—H⋯O hydrogen-bonding interactions involving the dihydrogendiphosphate anions and water molecules. The dihydrogendiphosphate anion, (H₂P₂O₇)²⁻, is bent and shows an almost eclipsed conformation.

Related literature

The triclinic title compound is isotypic with K₂Ni(H₂P₂O₇)₂·2H₂O (Tahiri et al., 2004 ) and K₂Zn(H₂P₂O₇)₂·2H₂O (Tahiri et al., 2003 ). For orthorhombic forms of crystals of this formula type, see: Tahiri et al. (2002 ); Essehli et al. (2005 ).

Experimental

Crystal data

K₂Co(H₂P₂O₇)₂·2H₂O
M_r = 525.1
Triclinic, $[P \overline 1]$
a = 6.8737 (14) Å
b = 7.3565 (11) Å
c = 7.6141 (14) Å
α = 80.740 (14)°
β = 72.397 (17)°
γ = 83.484 (14)°
V = 361.35 (12) Å³
Z = 1
Mo Kα radiation
μ = 2.29 mm⁻¹
T = 292 K
0.16 × 0.11 × 0.03 mm

Data collection

Oxford Diffraction Xcalibur diffractometer with a Sapphire 2 CCD detector
Absorption correction: analytical based on the crystal shape (CrysAlis RED; Oxford Diffraction, 2004 $[Oxford Diffraction (2004). CrysAlis CCD and CrysAlis RED. Oxford Diffraction Ltd, Abingdon, England.]$ ) T_min = 0.648, T_max = 0.838
4546 measured reflections
1489 independent reflections
1013 reflections with I > 3σ(I)
R_int = 0.054

Refinement

R[F² > 2σ(F²)] = 0.038
wR(F²) = 0.090
S = 1.17
1489 reflections
118 parameters
Only H-atom coordinates refined
Δρ_max = 0.47 e Å⁻³
Δρ_min = −0.45 e Å⁻³

Table 1
Selected geometric parameters (Å, °)

K1—O2ⁱ	2.785 (3)
K1—O4ⁱⁱ	2.884 (3)
K1—O5	2.979 (3)
K1—O6ⁱⁱⁱ	2.771 (4)
K1—O7^iv	2.919 (3)
K1—O8ⁱ	2.972 (4)
Co1—O2	2.101 (3)
Co1—O5	2.085 (3)
Co1—O8	2.094 (3)
P1—O1	1.602 (3)
P1—O2	1.495 (3)
P1—O3	1.496 (3)
P1—O4	1.556 (3)
P2—O1	1.602 (3)
P2—O5	1.493 (3)
P2—O6	1.546 (3)
P2—O7	1.499 (3)

P1—O1—P2	130.90 (19)
Symmetry codes: (i) -x+1, -y+1, -z+1; (ii) -x+1, -y, -z+1; (iii) x, y, z+1; (iv) -x+2, -y, -z+1.

Table 2
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O4—H1⋯O7ⁱⁱ	0.81 (5)	1.75 (5)	2.545 (5)	169 (5)
O6—H2⋯O3^v	0.72 (6)	1.82 (6)	2.522 (5)	168 (5)
O8—H3⋯O3^vi	0.71 (5)	2.03 (5)	2.745 (4)	178 (6)
O8—H4⋯O7^vii	0.79 (5)	2.01 (6)	2.798 (5)	175 (5)
Symmetry codes: (ii) -x+1, -y, -z+1; (v) x+1, y, z; (vi) -x+1, -y+1, -z; (vii) x, y+1, z.

Data collection: CrysAlis CCD (Oxford Diffraction, 2004 $[Oxford Diffraction (2004). CrysAlis CCD and CrysAlis RED. Oxford Diffraction Ltd, Abingdon, England.]$ ); cell refinement: CrysAlis RED (Oxford Diffraction, 2004 $[Oxford Diffraction (2004). CrysAlis CCD and CrysAlis RED. Oxford Diffraction Ltd, Abingdon, England.]$ ); data reduction: CrysAlis RED; program(s) used to solve structure: SIR2002 (Burla et al., 2003 ); program(s) used to refine structure: JANA2006 (Petříček et al., 2006 ); molecular graphics: DIAMOND (Brandenburg, 1999 ); software used to prepare material for publication: JANA2006.

Supporting information

Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536811016345/wm2482sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536811016345/wm2482Isup2.hkl

checkCIF report

Comment top

The triclinic form of K₂Co(H₂P₂O₇)₂^.2H₂O is isotypic with K₂Ni(H₂P₂O₇)₂^.2H₂O (Tahiri et al., 2004) and K₂Zn(H₂P₂O₇)₂^.2H₂O (Tahiri et al., 2003). All these K₂M(H₂P₂O₇)₂^.2H₂O dihydrogendiphosphates crystallise also in an orthorhombic form, see: Tahiri et al. (2002) for M = Co; Essehli et al. (2005) for M = Ni and Zn.

The crystal structure of the title compound can be described in terms of centrosymmetric {Co(H₂O)₂[H₂P₂O₇]₂}^4- units (Fig. 1) that are linked through K—O bonds and an intricate network of O—H···O hydrogen bonds into a three-dimensional network (Fig. 2). The slightly distorted coordination octahedron around Co²⁺ is composed of four O atoms from two bidendate [H₂P₂O₇]^2- groups in equatorial positions and two O atoms from water molecules in axial positions. The average Co—O bond length of 2.093 (8) Å is in the same range as 2.047 Å for the orthorhombic form (Tahiri et al., 2002). The dihydrogendiphosphate anion is bent and shows an almost eclipsed conformation, with an bridging angle P1—O1—P2 of 130.90 (19) °. P—O bond lengths and O—P—O angles values are of similar values as in known dihydrogendiphosphates. The K⁺ cation is coordinated by six O atoms in form of a very distorted octahedron, with K—O distances ranging from 2.771 (4) to 2.979 (3) Å. Such values are likewise found in isotypic or isoformular dihydrogendiphosphates.

Related literature top

The triclinic title compound is isotypic with K₂Ni(H₂P₂O₇)₂^.2H₂O (Tahiri et al., 2004) and K₂Zn(H₂P₂O₇)₂^.2H₂O (Tahiri et al., 2003). For orthorhombic forms of crystals of this formula type, see: Tahiri et al. (2002); Essehli et al. (2005).

Experimental top

To prepare the present crystals we used the same procedure as described in detail in (Tahiri et al., 2002). Solutions of CoCl₂^.4H₂O (10 ml, 10 mmol) and K₄P₂O₇ (10 ml, 20 mmol) were mixed in a beaker. The mixture was stirred for six hours and then allowed to stand for two weeks at room temperature. At the end of this period, large prismatic pink crystals have deposited, which were filtered-off and washed with a water-ethanol solution (20:80).

Computing details top

Data collection: CrysAlis CCD (Oxford Diffraction, 2004); cell refinement: CrysAlis RED (Oxford Diffraction, 2004); data reduction: CrysAlis RED (Oxford Diffraction, 2004); program(s) used to solve structure: SIR2002 (Burla et al., 2003); program(s) used to refine structure: JANA2006 (Petříček et al., 2006); molecular graphics: DIAMOND (Brandenburg, 1999); software used to prepare material for publication: JANA2006 (Petříček et al., 2006).

Figures top

	Fig. 1. : The main coordination polyhedra in the title compound, shown as an ellipsoid plot with anisotropic displacement parameters drawn at the 50% probability level. [Symmetry codes: (i) 1 - x, 1 - y, 1 - z; (ii) 1 - x, -y, 1 - z; (iii) x, y, 1 + z; (iv) 2 - x, -y, 1 - z].
	Fig. 2. : Projection of the structure along the b-axis. H-bonds are displayed as dashed lines.

dipotassium cobalt(II) bis(dihydrogendiphosphate) dihydrate top

Crystal data top

K₂Co(H₂P₂O₇)₂·2H₂O	Z = 1
M_r = 525.1	F(000) = 261
Triclinic, P1	D_x = 2.412 Mg m⁻³
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71069 Å
a = 6.8737 (14) Å	Cell parameters from 4546 reflections
b = 7.3565 (11) Å	θ = 3.1–26.6°
c = 7.6141 (14) Å	µ = 2.29 mm⁻¹
α = 80.740 (14)°	T = 292 K
β = 72.397 (17)°	Prism, pink
γ = 83.484 (14)°	0.16 × 0.11 × 0.03 mm
V = 361.35 (12) Å³

Data collection top

Oxford Diffraction Xcalibur diffractometer with a Sapphire 2 CCD detector	1489 independent reflections
Radiation source: Mo X-ray tube	1013 reflections with I > 3σ(I)
Graphite monochromator	R_int = 0.054
Detector resolution: 8.3438 pixels mm^-1	θ_max = 26.6°, θ_min = 3.1°
Rotation method data acquisition using ω scans	h = −8→8
Absorption correction: analytical based on the crystal shape (CrysAlis RED; Oxford Diffraction, 2004)	k = −9→9
T_min = 0.648, T_max = 0.838	l = −9→9
4546 measured reflections

Refinement top

Refinement on F²	4 constraints
R[F² > 2σ(F²)] = 0.038	Only H-atom coordinates refined
wR(F²) = 0.090	Weighting scheme based on measured s.u.'s w = 1/[σ²(I) + 0.0016I²]
S = 1.17	(Δ/σ)_max = 0.044
1489 reflections	Δρ_max = 0.47 e Å⁻³
118 parameters	Δρ_min = −0.45 e Å⁻³
0 restraints

Crystal data top

K₂Co(H₂P₂O₇)₂·2H₂O	γ = 83.484 (14)°
M_r = 525.1	V = 361.35 (12) Å³
Triclinic, P1	Z = 1
a = 6.8737 (14) Å	Mo Kα radiation
b = 7.3565 (11) Å	µ = 2.29 mm⁻¹
c = 7.6141 (14) Å	T = 292 K
α = 80.740 (14)°	0.16 × 0.11 × 0.03 mm
β = 72.397 (17)°

Data collection top

Oxford Diffraction Xcalibur diffractometer with a Sapphire 2 CCD detector	1489 independent reflections
Absorption correction: analytical based on the crystal shape (CrysAlis RED; Oxford Diffraction, 2004)	1013 reflections with I > 3σ(I)
T_min = 0.648, T_max = 0.838	R_int = 0.054
4546 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.038	0 restraints
wR(F²) = 0.090	Only H-atom coordinates refined
S = 1.17	Δρ_max = 0.47 e Å⁻³
1489 reflections	Δρ_min = −0.45 e Å⁻³
118 parameters

Special details top

Refinement. The hydrogen atoms were localized from the difference Fourier map. Their coordinates were refined independently. The isotropic temperature parameters of hydrogen atoms were calculated as 1.2*U_eq of the parent atom.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq
K1	0.89288 (17)	0.26574 (14)	0.70307 (15)	0.0365 (4)
Co1	0.5	0.5	0.5	0.0172 (3)
P1	0.32488 (16)	0.27153 (14)	0.24623 (14)	0.0181 (4)
P2	0.75153 (16)	0.18965 (14)	0.24070 (14)	0.0177 (4)
O1	0.5649 (4)	0.2309 (4)	0.1518 (4)	0.0242 (11)
O2	0.2951 (4)	0.3930 (4)	0.3932 (4)	0.0213 (10)
O3	0.2401 (4)	0.3486 (4)	0.0882 (4)	0.0241 (10)
O4	0.2372 (5)	0.0812 (4)	0.3353 (4)	0.0263 (11)
H1	0.252 (7)	0.045 (6)	0.437 (6)	0.0316*
O5	0.7435 (4)	0.3267 (4)	0.3681 (4)	0.0231 (10)
O6	0.9309 (4)	0.2143 (4)	0.0601 (4)	0.0258 (11)
H2	1.011 (7)	0.252 (7)	0.083 (7)	0.0309*
O7	0.7467 (5)	−0.0072 (4)	0.3310 (4)	0.0283 (11)
O8	0.5496 (5)	0.7064 (4)	0.2702 (4)	0.0274 (12)
H3	0.602 (8)	0.692 (7)	0.176 (7)	0.0329*
H4	0.606 (7)	0.790 (7)	0.280 (7)	0.0329*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
K1	0.0433 (6)	0.0353 (6)	0.0362 (6)	0.0096 (5)	−0.0215 (5)	−0.0093 (5)
Co1	0.0201 (4)	0.0177 (4)	0.0175 (4)	0.0005 (3)	−0.0093 (3)	−0.0069 (3)
P1	0.0183 (5)	0.0215 (6)	0.0184 (5)	−0.0008 (4)	−0.0095 (4)	−0.0062 (4)
P2	0.0193 (5)	0.0204 (6)	0.0166 (5)	0.0009 (4)	−0.0084 (4)	−0.0068 (4)
O1	0.0183 (15)	0.0363 (18)	0.0229 (15)	0.0048 (12)	−0.0110 (12)	−0.0128 (13)
O2	0.0212 (15)	0.0236 (15)	0.0238 (15)	−0.0009 (12)	−0.0095 (12)	−0.0110 (12)
O3	0.0222 (16)	0.0337 (17)	0.0198 (15)	−0.0011 (13)	−0.0130 (13)	−0.0008 (13)
O4	0.0359 (18)	0.0235 (16)	0.0238 (17)	−0.0081 (13)	−0.0143 (15)	−0.0005 (13)
O5	0.0225 (16)	0.0294 (16)	0.0225 (15)	0.0037 (13)	−0.0099 (13)	−0.0156 (13)
O6	0.0215 (17)	0.0403 (19)	0.0180 (15)	−0.0081 (14)	−0.0039 (13)	−0.0105 (14)
O7	0.0388 (18)	0.0224 (16)	0.0269 (17)	−0.0040 (14)	−0.0137 (14)	−0.0024 (13)
O8	0.039 (2)	0.0253 (18)	0.0188 (16)	−0.0079 (15)	−0.0065 (15)	−0.0063 (14)

Geometric parameters (Å, º) top

K1—O2ⁱ	2.785 (3)	Co1—O8ⁱ	2.094 (3)
K1—O4ⁱⁱ	2.884 (3)	P1—O1	1.602 (3)
K1—O5	2.979 (3)	P1—O2	1.495 (3)
K1—O6ⁱⁱⁱ	2.771 (4)	P1—O3	1.496 (3)
K1—O7^iv	2.919 (3)	P1—O4	1.556 (3)
K1—O8ⁱ	2.972 (4)	P2—O1	1.602 (3)
Co1—O2	2.101 (3)	P2—O5	1.493 (3)
Co1—O2ⁱ	2.101 (3)	P2—O6	1.546 (3)
Co1—O5	2.085 (3)	P2—O7	1.499 (3)
Co1—O5ⁱ	2.085 (3)	O4—H1	0.81 (5)
Co1—O8	2.094 (3)	O6—H2	0.72 (6)

O2ⁱ—K1—O4ⁱⁱ	123.43 (10)	O5ⁱ—Co1—O5	180
O2ⁱ—K1—O5	60.33 (9)	O5ⁱ—Co1—O8	86.81 (11)
O2ⁱ—K1—O6ⁱⁱⁱ	113.92 (10)	O5ⁱ—Co1—O8ⁱ	93.19 (11)
O2ⁱ—K1—O7^iv	151.28 (8)	O8ⁱ—Co1—O8	180
O2ⁱ—K1—O8ⁱ	60.69 (9)	O1—P1—O2	109.27 (18)
O4ⁱⁱ—K1—O5	72.55 (9)	O1—P1—O3	105.02 (15)
O4ⁱⁱ—K1—O6ⁱⁱⁱ	104.16 (10)	O1—P1—O4	106.45 (15)
O4ⁱⁱ—K1—O7^iv	74.58 (9)	O2—P1—O3	116.17 (17)
O4ⁱⁱ—K1—O8ⁱ	68.68 (9)	O2—P1—O4	110.05 (16)
O5—K1—O6ⁱⁱⁱ	166.01 (9)	O3—P1—O4	109.36 (19)
O5—K1—O7^iv	113.42 (9)	O1—P2—O5	110.97 (16)
O5—K1—O8ⁱ	57.71 (8)	O1—P2—O6	98.96 (17)
O6ⁱⁱⁱ—K1—O7^iv	77.87 (9)	O1—P2—O7	107.47 (18)
O6ⁱⁱⁱ—K1—O8ⁱ	108.32 (9)	O5—P2—O6	112.65 (18)
O7^iv—K1—O8ⁱ	143.17 (10)	O5—P2—O7	114.33 (17)
O2—Co1—O2ⁱ	180	O6—P2—O7	111.27 (17)
O2—Co1—O5	92.27 (11)	P1—O1—P2	130.90 (19)
O2—Co1—O5ⁱ	87.73 (11)	K1ⁱ—O2—Co1	95.37 (10)
O2—Co1—O8	87.94 (13)	K1ⁱ—O2—P1	110.42 (15)
O2—Co1—O8ⁱ	92.06 (13)	Co1—O2—P1	132.80 (16)
O2ⁱ—Co1—O2	180	K1ⁱⁱ—O4—P1	150.05 (19)
O2ⁱ—Co1—O5	87.73 (11)	P1—O4—H1	114 (4)
O2ⁱ—Co1—O5ⁱ	92.27 (11)	K1—O5—Co1	90.21 (10)
O2ⁱ—Co1—O8	92.06 (13)	K1—O5—P2	127.17 (15)
O2ⁱ—Co1—O8ⁱ	87.94 (13)	Co1—O5—P2	130.12 (19)
O5—Co1—O5ⁱ	180	K1^v—O6—P2	125.12 (18)
O5—Co1—O8	93.19 (11)	P2—O6—H2	107 (4)
O5—Co1—O8ⁱ	86.81 (11)	H3—O8—H4	101 (5)

Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) −x+1, −y, −z+1; (iii) x, y, z+1; (iv) −x+2, −y, −z+1; (v) x, y, z−1.

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
O4—H1···O7ⁱⁱ	0.81 (5)	1.75 (5)	2.545 (5)	169 (5)
O6—H2···O3^vi	0.72 (6)	1.82 (6)	2.522 (5)	168 (5)
O8—H3···O3^vii	0.71 (5)	2.03 (5)	2.745 (4)	178 (6)
O8—H4···O7^viii	0.79 (5)	2.01 (6)	2.798 (5)	175 (5)

Symmetry codes: (ii) −x+1, −y, −z+1; (vi) x+1, y, z; (vii) −x+1, −y+1, −z; (viii) x, y+1, z.

Experimental details

Crystal data
Chemical formula	K₂Co(H₂P₂O₇)₂·2H₂O
M_r	525.1
Crystal system, space group	Triclinic, P1
Temperature (K)	292
a, b, c (Å)	6.8737 (14), 7.3565 (11), 7.6141 (14)
α, β, γ (°)	80.740 (14), 72.397 (17), 83.484 (14)
V (Å³)	361.35 (12)
Z	1
Radiation type	Mo Kα
µ (mm⁻¹)	2.29
Crystal size (mm)	0.16 × 0.11 × 0.03

Data collection
Diffractometer	Oxford Diffraction Xcalibur diffractometer with a Sapphire 2 CCD detector
Absorption correction	Analytical based on the crystal shape (CrysAlis RED; Oxford Diffraction, 2004)
T_min, T_max	0.648, 0.838
No. of measured, independent and observed [I > 3σ(I)] reflections	4546, 1489, 1013
R_int	0.054
(sin θ/λ)_max (Å⁻¹)	0.629

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.038, 0.090, 1.17
No. of reflections	1489
No. of parameters	118
H-atom treatment	Only H-atom coordinates refined
Δρ_max, Δρ_min (e Å⁻³)	0.47, −0.45

Computer programs: CrysAlis CCD (Oxford Diffraction, 2004), CrysAlis RED (Oxford Diffraction, 2004), SIR2002 (Burla et al., 2003), JANA2006 (Petříček et al., 2006), DIAMOND (Brandenburg, 1999).

Selected geometric parameters (Å, º) top

K1—O2ⁱ	2.785 (3)	P1—O1	1.602 (3)
K1—O4ⁱⁱ	2.884 (3)	P1—O2	1.495 (3)
K1—O5	2.979 (3)	P1—O3	1.496 (3)
K1—O6ⁱⁱⁱ	2.771 (4)	P1—O4	1.556 (3)
K1—O7^iv	2.919 (3)	P2—O1	1.602 (3)
K1—O8ⁱ	2.972 (4)	P2—O5	1.493 (3)
Co1—O2	2.101 (3)	P2—O6	1.546 (3)
Co1—O5	2.085 (3)	P2—O7	1.499 (3)
Co1—O8	2.094 (3)

P1—O1—P2	130.90 (19)

Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) −x+1, −y, −z+1; (iii) x, y, z+1; (iv) −x+2, −y, −z+1.

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
O4—H1···O7ⁱⁱ	0.81 (5)	1.75 (5)	2.545 (5)	169 (5)
O6—H2···O3^v	0.72 (6)	1.82 (6)	2.522 (5)	168 (5)
O8—H3···O3^vi	0.71 (5)	2.03 (5)	2.745 (4)	178 (6)
O8—H4···O7^vii	0.79 (5)	2.01 (6)	2.798 (5)	175 (5)

Symmetry codes: (ii) −x+1, −y, −z+1; (v) x+1, y, z; (vi) −x+1, −y+1, −z; (vii) x, y+1, z.

Acknowledgements

We acknowledge support by the Grant Agency of the Czech Republic, grant No. P204/11/0809.

References

Brandenburg, K. (1999). DIAMOND. Crystal Impact GbR, Bonn, Germany. Google Scholar
Burla, M. C., Camalli, M., Carrozzini, B., Cascarano, G. L., Giacovazzo, C., Polidori, G. & Spagna, R. (2003). J. Appl. Cryst. 36, 1103. CrossRef IUCr Journals Google Scholar
Essehli, R., El Bali, B., Alaoui Tahiri, A., Lachkar, M., Manoun, B., Dušek, M. & Fejfarova, K. (2005). Acta Cryst. C61, i120–i124. Web of Science CrossRef CAS IUCr Journals Google Scholar
Oxford Diffraction (2004). CrysAlis CCD and CrysAlis RED. Oxford Diffraction Ltd, Abingdon, England. Google Scholar
Petříček, V., Dušek, M. & Palatinus, L. (2006). JANA2006. Institute of Physics, Czech Academy of Sciences, Prague, Czech Republic. Google Scholar
Tahiri, A. A., Messouri, I., Lachkar, M., Zavalij, P. Y., Glaum, R., El Bali, B. & Rachid, O. (2004). Acta Cryst. E60, i3–i5. Web of Science CrossRef IUCr Journals Google Scholar
Tahiri, A. A., Ouarsal, R., Lachkar, M., El Bali, B. & Bolte, M. (2002). Acta Cryst. E58, i91–i92. Web of Science CrossRef IUCr Journals Google Scholar
Tahiri, A. A., Ouarsal, R., Lachkar, M., Zavalij, P. Y. & El Bali, B. (2003). Acta Cryst. E59, i50–i52. Web of Science CrossRef IUCr Journals Google Scholar

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ISSN: 2056-9890

Volume 67| Part 6| June 2011| Pages i37-i38

doi:10.1107/S1600536811016345

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inorganic compounds\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

The triclinic form of dipotassium cobalt(II) bis­­(di­hydrogendiphosphate) dihydrate

Related literature

Experimental

Crystal data

Data collection

Refinement

Supporting information

Acknowledgements

References

inorganic compounds

The triclinic form of dipotassium cobalt(II) bis(dihydrogendiphosphate) dihydrate