2024-03-28T14:17:42+03:30
http://ijcm.ir/browse.php?mag_id=62&slc_lang=fa&sid=1
62-910
2024-03-28
10.1002
Iranian Journal of Crystallography and Mineralogy
www.ijcm.ir
1726-3689
2588-4719
10.61186/ijcm
1995
3
2
The Practical Application of Electron Beam Devices in
Mineralogy and Introducing Nesquehonite (MgC03 + 3820) as
a Rare Mineral in Eastern Part of Iran.
Electron microscopes (SEM, TEM) and electron
microprobe (EPMA) are useful research equipments that
can be used to examine the mineral raw materials and also
their industrial products and defi nite ly through the
produc ti on process of tr a nsform ing the minerals to
industrial products. These are useful equipmen ts, that can
provide all the information about weakly crystaline minerals
that could not be obtained by-X-rays methods (XRD,XRF),
Determination Thermal Analysis (DTA) o r o ptical
microscopy. Particle size distribution - shape and crystalline
size of mine rals - tex ture and recog nizing non crystalline
phases and quantit ative analysis of minerals and tbeir
products are just a few things of these equipments vast
abilites.
Electron microscopes
Electron microprobe
Crystaline minerals
1995
10
01
95
100
http://ijcm.ir/article-1-910-en.pdf
62-911
2024-03-28
10.1002
Iranian Journal of Crystallography and Mineralogy
www.ijcm.ir
1726-3689
2588-4719
10.61186/ijcm
1995
3
2
Crys ta l C rowth of Binary Semiconductors CdTe, CdSe, PbTe,
PbSc, find De t ermination or their Structural and Electrical
Parameters.
Si ng le c rys t als o f bin a ry semico ndu c to rs
CdTc,CdSe. PhTe and PbSe were grown by sublimat ion and
condensa tion techniq ues usi ng argon as the carri e r gas.
Powder X-ray di ffractomet ry as wel l as La ue mClhod wcre
employed fo r the stru ct ura l a na lysis. By usi ng Ha ll
techniq ue. the de nsity and polarity of charge car rie rs we re
de te rmined in single crysta ls. PbTc and PbSc c rys ta ls were
grown as p-type wit h charge densi ty of about l.l x1Q 18 em·3
whereas CdTc and CdSe were grown as intrinsic. Thcrmo *
elcctric technique was also uliliscd to dc le rmine the e nergy
gap of single and polycrystals of CdTc and CdSc.
Crystal Growtli
Vapour Tramport
Lauice Constant
Enew Gap.
1995
10
01
101
112
http://ijcm.ir/article-1-911-en.pdf
62-912
2024-03-28
10.1002
Iranian Journal of Crystallography and Mineralogy
www.ijcm.ir
1726-3689
2588-4719
10.61186/ijcm
1995
3
2
The Effect of Microstracture in
Magnetic Properties of Barium Ferrite
To study the effect of microstracturcs,long-time
grinding and nonmagnetic phase on magnl;tic properties of
barium fe rrite, isotropic samples of ba rium ferrile magnets,
BaU.6Fc203. were prepared by ce ra mics and co -
precipitation methods. Magnetic measurments indi ca tes a
higher demagnetization of the samples prepared by <.:hemical
method due to lack of rcmcnant stress and crystallographic
imperfect ions in th is case. Also, the inter med iate
nonmagnetic phases is less in samples prepared hy chemical
method. The optimum si ntering temperature for maximum
store of magnet ic e nergy is 925-950°C fo r che mica l and
950- 1000°C for ceramic methods.
Silllering
Microslntcture
Barium Ferrite
1995
10
01
113
122
http://ijcm.ir/article-1-912-en.pdf
62-913
2024-03-28
10.1002
Iranian Journal of Crystallography and Mineralogy
www.ijcm.ir
1726-3689
2588-4719
10.61186/ijcm
1995
3
2
X-Ray Profile Refinement of La2Cu04
Thl.: Ri elwc ld mc thod ofstructurl.: refinement
from powder dilTr<:lction patterns is widely used with neutron
data and int:reasingly so with x* ray data . [n this p<:lper the
Ril.:tveld method has hccn cxplainl.:d. As an ex.ample the
t: rystal :-.truclure of LazCu04 at rollm It:mperaturc has been
refined using x*ray powder dirfr<:lctiol1 data. The crystal
,lruc lure is llflhorombi c wilh a = 5.154S(4)A .
h = 5.411116(1)A . c = 13.1529 (9)A. and space gfllUp em,"'
A sample of La2Cu04 has been oxidized to La2Cu04+0 and
its magnetic susceptibily as a function or temperature has
heen studied. The new m(ltcrial is supcrconductor with
Tc == 30K. Further investigation is in progress to determine
the va lue or () and the position of the extra oxygen atOl11s in
tht..: cell.
Rietveld method
SlruCl/lre rejiflemem
crystal SfmClllre
1995
10
01
123
136
http://ijcm.ir/article-1-913-en.pdf
62-914
2024-03-28
10.1002
Iranian Journal of Crystallography and Mineralogy
www.ijcm.ir
1726-3689
2588-4719
10.61186/ijcm
1995
3
2
Synthesis and Crystal Structure Identification of
[Cd(H,O)(CrO.h(enhln
A new complex of cadmium was synthesized by
the reaction of cadmium nitrate, potm;sium dichromate, and
ethylenediamine. Its crystal structure was dete rmined by
X-ray diffractomctry. It is Crystalli:tt.:d in a monoclinic
system, with P21 /n(1 4) poinl group and 4 molecules of the
complex in the unit ceiL The cryst,d parameters arc:
a = 7.4615(7)A. h= 7.1480(2)A. c= 14.~4B5( 10)A
/3= 92.(196. V =79IAI(IO)A3
Because of the un usual bridge ligands of et hylenedi(lmine
and chromate, the complex has an interesting structure.
which is 3-dimensional and polymeric
Sywhesis
Crys/(II SfrUCflIre
Ethylenediamine
Cadmium Chromllle.
1995
10
01
137
144
http://ijcm.ir/article-1-914-en.pdf
62-915
2024-03-28
10.1002
Iranian Journal of Crystallography and Mineralogy
www.ijcm.ir
1726-3689
2588-4719
10.61186/ijcm
1995
3
2
Study of Microstructure of Piezoelectrics
BaTiO, , PbTiO, and Pb(Ti,Zr,_,)O,
Prepared by Solid Solution and Liquid Phase Methods
Samples of BaTi03, PbTi0 3, and Pb (Tix,Zr ].x)0 3
(x=0.4 7) was pre pare d usi ng so lid and liquid phase
me th ods. Mi cros tru cture study o r lh ese samples show a
h ig h ~ r degree of homogeneity, higher density and reactivity
in samples made by solutions phase method as compared to
the solid phase technique.
Piezoelectric
Micros/mClUre
Soild So/wion
Liquid Phase
1995
10
01
145
154
http://ijcm.ir/article-1-915-en.pdf
62-916
2024-03-28
10.1002
Iranian Journal of Crystallography and Mineralogy
www.ijcm.ir
1726-3689
2588-4719
10.61186/ijcm
1995
3
2
Study of Phisico - Chemical Charactristic of Ore Bearing Fluids
in Fluorite of Kamar - Mehdi
Homoginization temperature of fluorite [luid
indus ian indicate that mineralization has mostly take place
within the temperature ranging 70 to 1500C . the last ice
melting tcmpenttur ranges from 0 1O·2.2°C and shows that
salinity varies from 0 to 3.69 wt% equivalent NaC!.
Chemical analysis performed on The liquid phases of fluid
indusion show that mineralizing fluids were rich in Ca and
K. The above results along wilh data obtained by SEM
equipped with EDAX spectrophotometery reveals that
metal deposit of this mine were probably transported by
chloride complexes. Temperature decrease and boiling
accurancy were probably the cause of decomposition of
chloride complex at the depusitiunal sites.
Fluid inclusions
Fhwrile
Hydrolherma~ Geochemical unalysis
1995
10
01
155
164
http://ijcm.ir/article-1-916-en.pdf