TY - JOUR
T1 - Syntheses and Crystallization of Mineralogically Relevant Chalcogenide Glasses
AU - Tao, Hui
AU - Pring, Allan
AU - Xia, Fang
AU - Brugger, Joel
AU - Zhao, Jing
AU - Wang, Shufen
AU - Chen, Guorong
PY - 2010/9
Y1 - 2010/9
N2 -
Mineralogically relevant chalcogenide glasses with the composition Cu
x
Bi
5
Ag
5
(As
0.33
S
0.335
Se
0.335
)
90-x
(x=2, 6, and 10, in mol%) that approximate the chemistry of some unusual sulfide mineral assemblages were synthesized. The differential thermal analyses revealed that the glass transition temperature (T
g
), onset crystallization temperature (T
c
), and peak temperature of crystallization (T
p
) first increase significantly with an increasing Cu content from 2 to 6 mol%, and then remain almost constant when the Cu content further increases to 10 mol%; the glass thermal stability also increases with an increasing Cu content. Both dry annealing and hydrothermal treatments were carried out in the temperature range of 207°-331°C for up to 96 h. X-ray diffraction analyses on annealed samples showed that dry annealing and hydrothermal treatments produced different phase assemblages. Dry annealing produced crystallized phases AgBiSe
2
(bohdanowiczite), Cu
2
Se (berzelianite), Ag
3
AsS
3
(xanconthite), Cu
3
AsS
4
(luzonite), AgBi
3
S
5
, and As
4
CuS
9
, while hydrothermal treatments produced phases AgBiSe
2
(bohdanowiczite), AgBi
3
S
5
, and AgAsSe
2
. This case study presents a new way for studying the formation and alteration of minerals in nature.
AB -
Mineralogically relevant chalcogenide glasses with the composition Cu
x
Bi
5
Ag
5
(As
0.33
S
0.335
Se
0.335
)
90-x
(x=2, 6, and 10, in mol%) that approximate the chemistry of some unusual sulfide mineral assemblages were synthesized. The differential thermal analyses revealed that the glass transition temperature (T
g
), onset crystallization temperature (T
c
), and peak temperature of crystallization (T
p
) first increase significantly with an increasing Cu content from 2 to 6 mol%, and then remain almost constant when the Cu content further increases to 10 mol%; the glass thermal stability also increases with an increasing Cu content. Both dry annealing and hydrothermal treatments were carried out in the temperature range of 207°-331°C for up to 96 h. X-ray diffraction analyses on annealed samples showed that dry annealing and hydrothermal treatments produced different phase assemblages. Dry annealing produced crystallized phases AgBiSe
2
(bohdanowiczite), Cu
2
Se (berzelianite), Ag
3
AsS
3
(xanconthite), Cu
3
AsS
4
(luzonite), AgBi
3
S
5
, and As
4
CuS
9
, while hydrothermal treatments produced phases AgBiSe
2
(bohdanowiczite), AgBi
3
S
5
, and AgAsSe
2
. This case study presents a new way for studying the formation and alteration of minerals in nature.
UR - http://www.scopus.com/inward/record.url?scp=77956389108&partnerID=8YFLogxK
U2 - 10.1111/j.1551-2916.2010.03772.x
DO - 10.1111/j.1551-2916.2010.03772.x
M3 - Article
VL - 93
SP - 2434
EP - 2437
JO - JOURNAL OF THE AMERICAN CERAMIC SOCIETY
JF - JOURNAL OF THE AMERICAN CERAMIC SOCIETY
SN - 0002-7820
IS - 9
ER -