Table 1
(continued)
Stoichiometry
Na
l B
m H
n O
(l+3m+n)/
2
Name
Synth T(K)
Space group
Unit cell
(Å or deg.)
X-ray T(K)
B-O (Å)
ranges
Comments
l
m
n
Tetrahedral
Trigonal
Refs.
106.623
C2/c
11.8843,10.6026,12.2111
106.790
145
1.4451–1.5075
1.3655–1.3784
[15]
3
6
14
Tincalconite
(“pentahydrate”)
353
R32
11.09,21.07
1.454–1.507
1.330–1.386
Assumed n = 15 [16]
348
R32
11.097,21.114
108
1.442–1.495
1.361–1.374
Incomplete
occupancy [17]
R32
11.1402,21.207
291
1.445–1.493
1.364–1.370
[18]
1
2
4
Kernite (tetrahydrate)
P21
̸ c
7.022,9.151,15.676,
108.83
n/a
n/a
Assumed similar to
borax [19]
P21
̸ c
7.0172,9.1582,15.6774
108.861
1.48
1.37
Chain of 6-membered
rings [20]
P21
̸ c
7.022,9.151,15.676,
108.8
1.428–1.521
1.353–1.384
[21]
P21
̸ c
7.0172,9.1582,15.6774
108.861
1.436–1.523
1.350–1.383
[22]
1
2
1
(Monohydrate)
423
Pbca
8.540,10.263,14.547
1.452–1.503
1.356–1.392
[23]
1
2
0
973
P1̄
6.5445,8.6205,10.4855
93.279,94.870,90.843
295
1.434–1.492
1.295–1.453
6- and 6,6-spiro fused
rings [24]
2
5
7
Ezcurrite
P1̄
8.598,9.570,6.576
102.75,107.5,71.52
1.431–1.494
1.322–1.385
Chains of cond.
[B
5 O
6 (OH)
4 ]
−
[25]
2
5
5
Nasinite
423
Pna21
12.015,6.518,11.173
1.440–1.496
1.345–1.399
Sheets of cond.
[B5O6(OH)4]
−
[26]
453
Pna21
11.967,6.5320,11.126
153
1.4746
1.3685
[27]
443
Pc
11.323,6.5621,12.244
91.050
298
1.444–1.534
1.351–1.434
[28]
2
5
3
Biringuccite
523
P21
̸ c
11.1955,6.5607,20.7566
93.891
1.421–1.513
1.343–1.413
Condensed
Spiro-B5O6 [29]
1
3
4
Ameghinite
C2/c
18.428,9.882,6.326
1.443–1.506
1.342–1.398
[B
3 O
3 (OH)
4 ]
−
[30]
(continued)
110
C. C. Pye
(continued)
Stoichiometry
Na
l B
m H
n O
(l+3m+n)/
2
Name
Synth T(K)
Space group
Unit cell
(Å or deg.)
X-ray T(K)
B-O (Å)
ranges
Comments
l
m
n
Tetrahedral
Trigonal
Refs.
106.623
C2/c
11.8843,10.6026,12.2111
106.790
145
1.4451–1.5075
1.3655–1.3784
[15]
3
6
14
Tincalconite
(“pentahydrate”)
353
R32
11.09,21.07
1.454–1.507
1.330–1.386
Assumed n = 15 [16]
348
R32
11.097,21.114
108
1.442–1.495
1.361–1.374
Incomplete
occupancy [17]
R32
11.1402,21.207
291
1.445–1.493
1.364–1.370
[18]
1
2
4
Kernite (tetrahydrate)
P21
̸ c
7.022,9.151,15.676,
108.83
n/a
n/a
Assumed similar to
borax [19]
P21
̸ c
7.0172,9.1582,15.6774
108.861
1.48
1.37
Chain of 6-membered
rings [20]
P21
̸ c
7.022,9.151,15.676,
108.8
1.428–1.521
1.353–1.384
[21]
P21
̸ c
7.0172,9.1582,15.6774
108.861
1.436–1.523
1.350–1.383
[22]
1
2
1
(Monohydrate)
423
Pbca
8.540,10.263,14.547
1.452–1.503
1.356–1.392
[23]
1
2
0
973
P1̄
6.5445,8.6205,10.4855
93.279,94.870,90.843
295
1.434–1.492
1.295–1.453
6- and 6,6-spiro fused
rings [24]
2
5
7
Ezcurrite
P1̄
8.598,9.570,6.576
102.75,107.5,71.52
1.431–1.494
1.322–1.385
Chains of cond.
[B
5 O
6 (OH)
4 ]
−
[25]
2
5
5
Nasinite
423
Pna21
12.015,6.518,11.173
1.440–1.496
1.345–1.399
Sheets of cond.
[B5O6(OH)4]
−
[26]
453
Pna21
11.967,6.5320,11.126
153
1.4746
1.3685
[27]
443
Pc
11.323,6.5621,12.244
91.050
298
1.444–1.534
1.351–1.434
[28]
2
5
3
Biringuccite
523
P21
̸ c
11.1955,6.5607,20.7566
93.891
1.421–1.513
1.343–1.413
Condensed
Spiro-B5O6 [29]
1
3
4
Ameghinite
C2/c
18.428,9.882,6.326
1.443–1.506
1.342–1.398
[B
3 O
3 (OH)
4 ]
−
[30]
(continued)
110
C. C. Pye