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Compounds with arsenate and bromide ions
The arsenite bromides are
mixed anion compounds containing both
arsenite and
bromide ions. Similar compounds include arsenate bromides,
[1] arsenite chlorides,
[1] antimonite bromides, antimonite chlorides,
[2] and ...
They are in the category of halide oxidoarsenates(III)
List
chem
mw
crystal system
space group
unit cell Å
volume
density
comment
references
Ermakovite
(NH4 )(As2 O3 )2 Br
hexagonal
P 6/mmm
a = 5.271 c = 9.157 Z = 1
220.3
3.64
uniaxial (–), ω = 1.960 ɛ = 1.716 at 589 nm
[3]
In4 (As2 O5 )(As3 O7 )Br3
triclinic
P 1
a=7.998 b=10.532 c=11.952 α=70.92° β=79.62° γ=80.27° Z=2
928
4.527
stable to 530°C
[4]
La3 OBr[AsO3 2
tetragonal
P 42 /mnm
a = 13.043 c = 5.6127 Z=4
954.8
5.27
colourless
[1]
Ce3 OBr[AsO3 2
[5]
Nd3 OBr[AsO3 2
[5]
Sm3 OBr[AsO3 2
[5]
Gd3 OBr[AsO3 2
[5]
Tb3 OBr[AsO3 2
[5]
Tm3 Br2 [As2 O5 ][AsO3 ]
triclinic
P 1
a = 5.3496 b = 8.6926 c = 10.8184 α = 90.723° β = 94.792° γ = 90.119° Z=2
6.760
pale yellow
[5]
Beudantite
PbFe3 (OH)6 SO4 AsO4
trigonal
R 3 m
a = 7.32, c = 17.02 Z=3
789.79
4.48
Uniaxial (-) n ω = 1.957 n ε = 1.943 Birefringence: 0.014
[6]
Gallobeudantite
PbGa3 (AsO4 )(SO4 )(OH)6
trigonal
R 3m
a = 7.225, c = 17.03 Z=3
769.88
4.87
uniaxial (–) n ω = 1.763 n ε = 1.750
[7]
References
^
a
b
c Yahia, Hamdi Ben; Pöttgen, Rainer; Rodewald, Ute Ch. (2010-10-01).
"Crystal Structure of La 3 OBr[AsO 3 ] 2" . Zeitschrift für Naturforschung B . 65 (10): 1289–1292.
doi :
10.1515/znb-2010-1018 .
ISSN
1865-7117 .
S2CID
196918204 .
^ Locke, Ralf J. C.; Goerigk, Felix C.; Schäfer, Martin J.; Höppe, Henning A.; Schleid, Thomas (2022).
"Synthesis, crystal structures and spectroscopic properties of pure YSb 2 O 4 Br and YSb 2 O 4 Cl as well as Eu 3+ - and Tb 3+ -doped samples" . RSC Advances . 12 (2): 640–647.
doi :
10.1039/D1RA08382A .
ISSN
2046-2069 .
PMC
8693579 .
PMID
35425089 .
^ Karpenko, Vladimir Yu.; Pautov, Leonid A.; Siidra, Oleg I.; Mirakov, Mirak A.; Zaitsev, Anatoly N.; Plechov, Pavel Yu.; Makhmadsharif, Saimudasir (February 2023).
"Ermakovite (NH 4 )(As 2 O 3 ) 2 Br, a new exhalative arsenite bromide mineral from the Fan-Yagnob coal deposit, Tajikistan" . Mineralogical Magazine . 87 (1): 69–78.
Bibcode :
2023MinM...87...69K .
doi :
10.1180/mgm.2022.116 .
ISSN
0026-461X .
S2CID
252906686 .
^ Pekov, Igor V.; Britvin, Sergey N.; Krivovichev, Sergey V.; Yapaskurt, Vasiliy O.; Vigasina, Marina F.; Turchkova, Anna G.; Sidorov, Evgeny G. (1 April 2021). "Vasilseverginite, Cu9O4(AsO4)2(SO4)2, a new fumarolic mineral with a hybrid structure containing novel anion-centered tetrahedral structural units". American Mineralogist . 106 (4): 633–640.
Bibcode :
2021AmMin.106..633P .
doi :
10.2138/am-2020-7611 .
S2CID
226659801 .
^
a
b
c
d
e
f Goerigk, Felix C.; Schander, Svetlana; Wickleder, Mathias S.; Schleid, Thomas (2020-07-15).
"The Triclinic Lanthanoid(III) Halide Oxidoarsenates(III) Sm 3 Cl 2 [As 2 O 5 ][AsO 3 ] and Tm 3 Br 2 [As 2 O 5 ][AsO 3 ]" . Zeitschrift für anorganische und allgemeine Chemie . 646 (13): 985–991.
doi :
10.1002/zaac.201900360 .
ISSN
0044-2313 .
S2CID
225602969 .
^
"Beudantite" . www.mindat.org . Retrieved 2022-05-25 .
^
"Gallobeudantite" . www.mindat.org . Retrieved 2022-05-24 .
Salts and covalent derivatives of the
bromide ion