@article{ author = {}, title = {Structure Studies of YBa,Cu,O,_JAg by XRD and SEM}, abstract ={The YBa2Cul07_6 (YBCO) superconductor ceramic has low critil..lil current density (Jc) because or weak linb between its grains. There have been a lot or effons to increase Jl. One or Ihe methods to increase Jc is to dope YBCO with other materials such as silver (Ag). In th is paper. the effect of adding silver to YBCO with the weight ratio of 0% 10%,15%. 20% and 30% on its mil:rostrul:lure have been investigated. The X-ray diffraction (XRO) ilnd scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) dj il gra Ul~ of ~ilmpb hilvc been obtained and studied. The study of XRD patterns shows 1ha1 Ag i~ l1 ppCilrs l iS a scparalc ph use in the sa mplc..c; ,.lOti the: position Ill' YBeQ peaks do nut considerable l:hangcs. The study or SEM of samples rcveal~ that the Ag ildtkd to YBea docs not prese nt in its micros tructure and doc~ nnt t.;hangt.: the lattice constants of YBeO by l:()n~lderllbk amount, and also thl: Ag grains remain among YBCO grains ami providc the better intcrgnmular contact. The pi..'rr.:l!nt<tl!~ 01 'iil'CI I'm optomll"mg the phy.;;(ill pfllpCr1It.:~ 01 YBeQ ~upcn;()nducturcs i~ almost 20.}, Keywords = {YBaICu l0 7_'" Superconductor, Silver, XRD and SEM}, volume = {7}, Number = {2}, pages = {73-82}, publisher = {Iranian Socity of Crystallography and Mineralogy}, title_fa = {بررسی ساختار YB2CU3O7- با XRD و SEM}, abstract_fa ={ابررسانای سرامیکی YB2CU3O7- (ایبکو)  به دلیل اتصال های ضعیف بین دانه ای، دارای چگالی جریان بحرانی (Jc) ، برای افزایش Jc تحقیقات بسیاری صورت گرفته است. یکی از روش های افزایش آن آلاییدن ایبکو به مواد دیگر از جمله نقره است....}, keywords_fa = {ابررسانای YB2CU3O7-, نقره, XRD, SEM}, url = {http://ijcm.ir/article-1-870-en.html}, eprint = {http://ijcm.ir/article-1-870-en.pdf}, journal = {Iranian Journal of Crystallography and Mineralogy}, issn = {1726-3689}, eissn = {2588-4719}, year = {1999} } @article{ author = {}, title = {Interpretation of Diffraction Patterns and Crystal Structure Determination of CdSe by Transmission Electron Microscopy}, abstract ={Single crystals of binary semiconducto r CdSe were grown by subJimalion and conde nsation techniques wing ca rrier argon gas. Powder X-ray diffraction as well as Transmission e lectron microscopy o f powde red crystals confiml Ihe cryslal st ructure to be hexagonal with : a = 4.299 A, c = 7.010 A and space grope P6,MC}, Keywords = {Crystal SIrUClUre, Transmission Eleclron Microscopy, Diffractioll Paltems}, volume = {7}, Number = {2}, pages = {83-94}, publisher = {Iranian Socity of Crystallography and Mineralogy}, title_fa = {تفسیر نقشهای پراش و تعیین ساختار بلوری CdSe با استفاده از میکروسکوپ الکترونی تراگسیلی}, abstract_fa ={تک بلور CdSe به روش تصعید و چگالش ماده در حضور گاز حامل آرگون رشد داده شد. با استفاده از پراش سنجی پرتو X و تفسیر نقشهای پراش حاصل از میکروسکوپ الکترونی تراگسیلی، ساختار ششگوشی آن با ثابتهای شبکه ای زیر تایید شد....}, keywords_fa = {میکروسکوپ الکترونی تراگسیلی, رشد بلور, ساختار بلوری}, url = {http://ijcm.ir/article-1-871-en.html}, eprint = {http://ijcm.ir/article-1-871-en.pdf}, journal = {Iranian Journal of Crystallography and Mineralogy}, issn = {1726-3689}, eissn = {2588-4719}, year = {1999} } @article{ author = {}, title = {Occurrence 411\' Cobalt Mineralization in Tidar area - E(llid}, abstract ={The Tidtir CObHl1 deposit is Im.:alell IX km northwesl 01 Ihe I()wn ul Eqliu, in Ihe S:tlwndaj - Sirjan zonc. Cobalt mincralil.ation occur:-. 111 a Ic horizon)' concordant Wi lh, and within Ihe :-.cdmlcnlary detrital :-.equem.:cs of limeslom:, sa nd)'lOnc and marl of upper jurassk (M,dm) age. The main minerals arc magnclile and changing gradually 10 hemalite anu then to limonite and g()clh ile. Co, Ni, Mn, Ti, A:-., bearing minerals also tlI..:cur. These minerals represents an oxidized environment, hu whether coha lt bearing pha~es, (Ire part or the ox idized zone or helong 10 an independent sou rce underneath, is the subject of Ihis study. Association of cobalt wilh Iron, man g~ n Ci>e and day mmcr .. h (),ta,cngcr components) .lotrongly .loUpport thc hypOthc..i 01 ad:-.urbtioll. 11,,; ~ h:-.e lltc of ullramafic oUlcrops. the Slratiform nature of mineralized horizons, the Inw Ph and Zn content s, Ihe absence of indir..:ator minerals of reduced far..:ies, rejcr..:1 the known models of caha lt mineralization (skarn, laterilit, hydrothermal. m<lgmatic and stratiform) for Tidar deposit The weathered m3fie or ultml1afic plulon is probahly the primary source of cahall; The free Cohalt released from thb pluton b transp0 rl cd to the upper Jurassic :-.edimcnt al)' basin, or had been moved as a CObill! hearing phase to the depos ition si le, where il was weathered and Co was releases. And finall y, the free Cobalt ions ei ther were adsorbed on certain mineral grain s. or INf' lI~r()~il (' d ;1~ amrlrphnllS eompollo(h fillin!! the ;,<vOIil;;blc open SPU(;CS,}, Keywords = {Cubalt Mineralizatioll, Swface adsorh/ioll oj Co/)a/I, Sanandaj - Sirjal/ Zone, Eqlid}, volume = {7}, Number = {2}, pages = {95-108}, publisher = {Iranian Socity of Crystallography and Mineralogy}, title_fa = {رویداد کانی سازی کبالت در ناحیه تیدر اقلید}, abstract_fa ={کانسار تیدر در 18 کیلومتری شمال غرب اقلید واقع است. کانه زائی در تعدادی افق معدنی همشیب و همروند با واحدهای رسوبی منطقه شامل توالیهای آواری آهکی ، ماسه سنگی و شیلی ژوراسیک بالایی (مالم) حادث شده است. ترکیبات اکسیدی آهندار در اثر هوازدگی از مگنتیت به هماتیت و سپس به لیمونیت و گوتیت تغییر پیدا کرده اند...}, keywords_fa = {کانی سازی کبالت, جذب سطحی, کمربند سنندج-سیرجان, اقلید}, url = {http://ijcm.ir/article-1-872-en.html}, eprint = {http://ijcm.ir/article-1-872-en.pdf}, journal = {Iranian Journal of Crystallography and Mineralogy}, issn = {1726-3689}, eissn = {2588-4719}, year = {1999} } @article{ author = {}, title = {Study of Ni(OO) Surface Via l/E Curves in LEED Methods}, abstract ={The rcnccted beam intensity as a lunctlon of dcclron energy ( lIE curve) is studied for an ideal (001) Ni surface by low energy electron diffraction (LEED). Double layer method, rcnormalized forward scattering (RFS) and quasi-dynamic method arc used for lIE curves calculation. The role of structural and nonstructural parameters of Ni on lIE curves is examined. The crfect or the optical potcnti .. , und numbcl o f scnltcrcd bcums on these curve:! arc also studied.}, Keywords = {LEED, Ni Sur/ace, Relaxation}, volume = {7}, Number = {2}, pages = {109-120}, publisher = {Iranian Socity of Crystallography and Mineralogy}, title_fa = {مطالعه سطح Ni(001) با استفاده از محاسبه منحنی های I/E در روش (LEED)}, abstract_fa ={طیف شدت موج بازتابش بر حسب انرژی در روش پراش الکترون های کم انرژی (LEED) از یک سطح ایده ال نیکل (001) مورد مطالعه قرار گرفته است.}, keywords_fa = {سطح نیکل, واهلش, LEED}, url = {http://ijcm.ir/article-1-873-en.html}, eprint = {http://ijcm.ir/article-1-873-en.pdf}, journal = {Iranian Journal of Crystallography and Mineralogy}, issn = {1726-3689}, eissn = {2588-4719}, year = {1999} } @article{ author = {}, title = {Reaction of Nitric Oxide with Cu(lll) Single Crystal}, abstract ={The adsorption of nit ric oxide on a Cu(1l1) surface has been studi ed using X-ray photoelectron (XPS) and high resolution e lectron energy loss spectroscopies (HREEL) in the tcmpenllurc range 80-410 K. Nitricoxide had no interacation with surface at room tempe rature, while it was adsorbed molecularly on un an nealed Cu surface and then dissociated to ni trogen and oxygen atoms. Exposure of surface to NO at 80K showed mo lecular adsorpt ion of NO and N20. The exposure dependent HREEL spectra of NO at the clean Cu su rface at 80K and for subsequent warming up to room temperature showed loss peaks at 344 em-I, 680 em-I, 1525 em-I, 1830 em-I, and 2140 em-I. The vibrational mode at 1830 cm-l was ass igned to N-O stretch of NO handed in a lOp position, the 1525 cm-l loss peak was attributed to the N-O stretch of NO honded in two fold bridge sites, the loss peak at 680 cm-l was assigned to a bending mode of NO(adS) the loss peak at 2140 em-I was due to (N-N) stre tChing mode of N20 formed. The intense feature at 344 em-I was identified as the Cu-NO stre tching mode_}, Keywords = {Adsorptioll of Nitric Oxide, X-ray photoelectron speclfoscopy (XPS), High resolution eleclron energy loss spectroscopy, }, volume = {7}, Number = {2}, pages = {121-132}, publisher = {Iranian Socity of Crystallography and Mineralogy}, title_fa = {واکنش اکسید ازت با تک بلور مس (111)}, abstract_fa ={چگونگی جذب اکسید ازت به وسیله سطح (111) یک تک بلور مس با استفاده از روش طیف نمایی فتوالکترون پرتو ایکس (XPS) و طیف نمایی با قدرت تفکیک بالا از گاهش انرژی الکترون (HREELS) در گستره دمایی 80 تا K 410 مورد مطالعه قرار گرفته است...}, keywords_fa = {جذب اکسید نیتریک, روش طیف نمایی فتوالکترون پرتو ایکس و طیف نمایی با قدرت تفکیک بالا از کاهش انرژی الکترون}, url = {http://ijcm.ir/article-1-874-en.html}, eprint = {http://ijcm.ir/article-1-874-en.pdf}, journal = {Iranian Journal of Crystallography and Mineralogy}, issn = {1726-3689}, eissn = {2588-4719}, year = {1999} } @article{ author = {}, title = {Determinatiun uf Firing Temperature of Pottery , Brick and Tile by XRD and STA}, abstract ={Ccrumic refers to all fircd products incl uding pou ery, hrick. and tile that is primarily composed of clay with different iJlllo unts of o ther materia ls thaI have a source from soil and when they lired .produced a hard material. Firing the clay body to the hanJness of ceramic hody is the next critical stage in manufm:turing. To de termine the firing te mperatu re. four lired (450, 600. 850. 1000°C) togc ther with unfin..:d day samples were studied, usmg XR 0 and STA methods. and then an unidentified tiring temperature sample was examined. Format ion of new mi ne rals in the temperature... m("ntioned above and the stage o f l:arhonah::s e hmin<ltion can he (h;:termined with X RD. but to get a h~th,;r n,;:»u lt, :-opcl:Lally for tho:»e samples which fired tl:lllpL:ratur.! is nearly oOt/°C. it is necc:»s.lry 10 usc STA melhod}, Keywords = {POlfery, X-ray diffraClioll, Thermal analysis, ArcJllleology, Conservation}, volume = {7}, Number = {2}, pages = {133-142}, publisher = {Iranian Socity of Crystallography and Mineralogy}, title_fa = {تعیین دمای پخت سفال، آجر و کاشی به وسیله ی XRD و STA}, abstract_fa ={سرامیک به کلیه فراورده های پخته شده اعم از آجر، کاشی و سفال اطلاق می شود که از رس و مقادیر متفاوتی مواد پر کننده با منشا خاک ساخته شده و در اثر گرما به فراورده سختی تبدیل شده اند. هر یک از تغییرات اساسی که در ساختار ترکیبات سازنده در حین پخت روی می دهد مرحله تعیین کننده ای}, keywords_fa = {پخت سفال, پراش سنجی پرتو ایکس, تجزیه گرمایی, باستان شناسی}, url = {http://ijcm.ir/article-1-875-en.html}, eprint = {http://ijcm.ir/article-1-875-en.pdf}, journal = {Iranian Journal of Crystallography and Mineralogy}, issn = {1726-3689}, eissn = {2588-4719}, year = {1999} } @article{ author = {}, title = {Mineralogy, Chemical Compusitiun a nd Industrial use of f eld spars from Ma shhad and in Comparison with oth er fe ldspar Depus its in Iran}, abstract ={Milshhad ~fani l c and l!,funodinrilcs arc inlfUlkd in th ree different period between Triass ic to Lue JU fllssic. Muscovi te- biotitl! gr:tn itc and pegmatill!s (the you nge ls) arc exposed be tween Khal adgc ,md Khaj c h Mourad area. Alkali fe ld spars within pegmatite d ykes. between G hcshlagh, iloll Khladgc, we re sludit!d in detai l inclucJing l}rC rese rve es ti mation. mineralogy. chemical composition. and industrial uses. Fddspar in the Gheshlagh area is K-rich type (K20>%9 and Na.p< %2). While in Kbajch Moufild lIrC<I. hoth types of K lind NlI -rich fe ldspa rs arc recognized, "'~ Ghcshlagh feldspar L'i suitable for ceramic body and the N,Hich type I:rom Khajeh Mourad is applicable in glass and as filler in paint and rubber industries.}, Keywords = {Alkali feldspar, Albi", K-fc/dspar, Cemmics, Glass. Abstract: Milshhad}, volume = {7}, Number = {1}, pages = {3-14}, publisher = {Iranian Socity of Crystallography and Mineralogy}, title_fa = {کانی شناسی، ترکیب شیمیایی و مصارف صنعتی فلدسپاتهای مشهد و مقایسه آنها با دیگر فلدسپاتهای ایران}, abstract_fa ={گرانودیوریت و گرانتیهای محدوده ده نو – وکیل اباد – خواجه مراد در سه مرحله زمانی در محدوده تریاس تا اواخر ژوراسیک نفوذ کرده اد. پگماتیهای واقع در مسکویت – بیوتیت گرانیت، و فلدسپات گرانیت، جوانترین توده های نفوذی جنوب مشهد اند. ....}, keywords_fa = {فلدسپات قلیایی, آلبیت, پتاسیم فلدسپات, سرامیک, شیشه}, url = {http://ijcm.ir/article-1-863-en.html}, eprint = {http://ijcm.ir/article-1-863-en.pdf}, journal = {Iranian Journal of Crystallography and Mineralogy}, issn = {1726-3689}, eissn = {2588-4719}, year = {1999} } @article{ author = {}, title = {Software Development for Crystal Structure Determination}, abstract ={A software in fortran is developed to determine crystal structure of cubic. tetragonal. hexago nal and orthorhombic crystals from powder ditTraction d values. The general 1t6s method is also used for triclinic and monoclinic crystals.}, Keywords = {Crysflll Srruerure, Triclinie, Monoclinic, Orrllorlwmbic, Tetragonal, Hcragonlll, Cubic}, volume = {7}, Number = {1}, pages = {15-32}, publisher = {Iranian Socity of Crystallography and Mineralogy}, title_fa = {تهیه نرم افزار تعیین ساختار بلور}, abstract_fa ={در این مقاله اصول کلی برنامه های رایانه ای به زبان فرترن برای تعیین ساختارهای مکعبی ، شش گوشی، چهار گوشی، و راستگوشی ارائه شده است. همچنین روش عمومی ایتو برای تعیین ساختارهای تک میلی ...}, keywords_fa = {ساختار بلوری, مکعبی, چهارگوشی, شش گوشی, راست گوشی, تک میل, سه میل}, url = {http://ijcm.ir/article-1-864-en.html}, eprint = {http://ijcm.ir/article-1-864-en.pdf}, journal = {Iranian Journal of Crystallography and Mineralogy}, issn = {1726-3689}, eissn = {2588-4719}, year = {1999} } @article{ author = {}, title = {Distinction of dolomites based on texture in the Middle Jurassic carhnnate rocks of Northeast Mashhad}, abstract ={The Mozduran One Formation (Middle Jura~!;ic ) in NE Ma!;hhad is mainly composed o f dolomite and limestone. Based on texture (size and fabri c), dolomites were divided into 5 diITerent types with a crystal size which ranges from 10 to 1200 microns. Type one is very fine tn fine subhedral to euhedral crystals. while type two is fine to medium euhedral with poikilotopic texture. Type three is medium planar suhhedralto anhedral crystals with idintopic texture. Type four is medium to coarse anhedral nonpianar crystals and type five is coarse with dolomite cement. Distinction between types 3 and ,1 is difficuil and is mainly based on the larger number of crystal hthliidries in type three and stronger undulose extinction in type four. Dolomite.'I of types nne to three are mainly formed in the early stages. while types 4 and 5 formed during the burial. in the late stages of the diagenetic history of the rock. It is concluded that ba'led on texture. dolomites can be divided into different types and thereby the ir origin can be interpreted.}, Keywords = {Dolomite. Texture, Mozdurall, Kopet-Dagh}, volume = {7}, Number = {1}, pages = {33-44}, publisher = {Iranian Socity of Crystallography and Mineralogy}, title_fa = {تفکیک دولومیتها براساس بافت در سنگ های کربناته ژوراسیک میانی در شمال شرق مشهد}, abstract_fa ={سازند مزدوران یک با سن ژوراسیک میانی شمال شرق مشهد بیشتبر از دولومیت و سنگ آهک تشکیل شده است. دولومیتهای این سازند با استفاده از بافت (اندازه و فابریک) به 5 دسته تقسیم شده اند که اندازه بلورهای آنها از 10 تا 1200 میکرون در تغییرند......}, keywords_fa = {دولومیت, بافت, مزدوران, کپه داغ}, url = {http://ijcm.ir/article-1-865-en.html}, eprint = {http://ijcm.ir/article-1-865-en.pdf}, journal = {Iranian Journal of Crystallography and Mineralogy}, issn = {1726-3689}, eissn = {2588-4719}, year = {1999} } @article{ author = {}, title = {Molecular Structure determination of Trimethy l ~ . (benzoylmethyl)l benzyl Silane}, abstract ={The Crystal Structure of I <It • (bcnzoylmc thyl) benzyll Silane (CH3h Si CH (C(> H ~ )CH2 COC(>Hs has been determined by direct method (Sir). The dimensions of used cry:,tal were 0.7 x 0.3 x 0.2 mm. TIle molecular structure has been determined by MolEN program. This compound crystalizc.s in monoclinic space group P2t /n (14) with four molecules per unit cell. Lattice parameters of this compound an.:: : a = 6.0938 A. h = 22.8465 A. c = 12.0533 A. p= 92.0605' Afll.::r lasl least· square cycle, lht.! final R anJ R.,... values are 0.087 and 0.093 , re.spectively.}, Keywords = {benzoyl methyl, benzyl. Silane. Crystal Structure}, volume = {7}, Number = {1}, pages = {45-54}, publisher = {Iranian Socity of Crystallography and Mineralogy}, title_fa = {تعیین ساختار مولکولی تری متیل [بنزوئیل متیل) بنزیل سیلان}, abstract_fa ={ساختار بلوری ترکیب سنتز شده جدیدی تری متیل (بنزوئیل متیل) بنزیل سیلان ....}, keywords_fa = {بنزوئیل متیل, بنزیل, سیلان, ساختار بلورین}, url = {http://ijcm.ir/article-1-866-en.html}, eprint = {http://ijcm.ir/article-1-866-en.pdf}, journal = {Iranian Journal of Crystallography and Mineralogy}, issn = {1726-3689}, eissn = {2588-4719}, year = {1999} } @article{ author = {}, title = {Application of Oxygen and Carbon Isotopes in Separation of Low and High Temperature Dolomites in Northeast of Iran}, abstract ={this study is focused on do lomi te s of the Chehel-Kaman Formation (Upper Paleocene) that is located in NE Iran. Field and petrographic studies lead to distinguish dl and d2 dolomites. dL is fine crystals (Ie.<;ser than 10 micron) and is associated with t:vaporatic sed ime nts. and d2 in addition to fint: crystals. contains coarser crystals (50-RO micron) without evaporatic sediments. Also. oxygen isotope of ell is hCltvicr than -2.5 %" PDB and oxygen isotope of d2 is lighter than - 6.5 %0 PDB. C'lrbon isotope in these dolomites ranges between + 1.8 %0 to +3.5 %0 PDB. These data along with CL o bse rvation show that d l dolomites are formed in lower temperature (calculated temperature is 26°C) within supratidal environment, while d2 dolomites are formed in higher temperature (calculated temperature is more than n °C) during burial stage.}, Keywords = {Dolomites. Kopet-Dagh, Carbon and Oxygen isotopes, C/u!hel-Kumllll Furmation}, volume = {7}, Number = {1}, pages = {55-66}, publisher = {Iranian Socity of Crystallography and Mineralogy}, title_fa = {کاربرد ایزوتوپهای اکسیژن و کربن در تفکیک دولومیتهای دمای پایین و بالا در شمال شرق ایران}, abstract_fa ={دولومیتهای مورد بررسی بخشی از واحدهای سنگی سازند چهل کمان (با سن پالئوسن فوقانی ) است که در شمال شرق ایران قرار دارد. مطالعات صحرائی و پتروگرافیکی (سنگ به شناختی) منجر به تشخیص دو نوع دولومیت ....}, keywords_fa = {دولومیت, ایزوتوپهای کربن و اکسیژن, کپه داغ, سازند چل کمان}, url = {http://ijcm.ir/article-1-867-en.html}, eprint = {http://ijcm.ir/article-1-867-en.pdf}, journal = {Iranian Journal of Crystallography and Mineralogy}, issn = {1726-3689}, eissn = {2588-4719}, year = {1999} }