简介：Britholite-（Y）（abukumalite）,arare-earthmineralfirstdiscoveredinJapanandSovietUnionin1963,wasrecentlydiscoveredinHenanProvince,China,bySongChunliu,QiaoBingkunandZhangJianhong.Itisasilicatemineralofa-patite-structure.Itschemicalformulais（Y,Ca,Dy）（SiO4）3（OH,F）.Itcontainsabout44%YRO3andnearly5%Dy2O3.Themineraloccursingraniteinassociationwithgadolinite,fergusonite,samarskite,

简介：

简介：Henanprovinceisveryrichinrefractorymineralsofmanyvarietiesincludingsilica,dolomite,graphite,pearlite,sepiolite,olivine,andsillimanitegroupminerals,besidestheabundantreservesoffireclayandbauxite,whichlayagoodfoundationforthedevelopmentoftherefractoriesindustryoftheprovince.Thepaperintroducesthereserves,distributionandcharacteroftherefractorymineralsinHenanprovince.

简介：TheRamanspectraofthenaturalendmembersofthegarnet-groupminerals,whichincludepyrope,almandineandspessariteofFe-Algarnetseriesandgrossularite,andraditeanduvaroviteofCa-Fegarnetseries,havebeenstrdied.MeasuredRamanspectraofthesemineralsarereasonablyandqualitativelyassignedtotheinternalmodes,translationalandrotatorymodesofSiO4tetrahedra,aswellasthetranslationalmotionofbivalentcationsintheXsite.ThestretchandrotatoryA1gmodesfortheFe-AlgarnetseriesshowobviousRamanshiftsascomparedwiththosefortheCa-Fegarnetseries,owingtothecationsresidingintheXsiteconnectedwithSiO4tetrahedrabysharingthetwoedges.TheRamanshiftsofallmemberswithineitheroftheseriesareattributedmainlytothepropertiesofcationsintheXsitefortheFe-AlgarnetseriesandintheYsitefortheCa-Fegarnetseries.

简介：

简介：RapidgrowthofZnOhexagonaltubesbydirectmicrowaveheatingZHUZhenqiandZHOUJianAbstractZincoxidehexagonaltubularcrystalsweresynthesizedby

简介：Theobjectivesofthisresearchweretocharacterisetheclaymineralscompositionofsoil-deriveddustinNorthernChinaandtosetupamineralogicalsignaturetotracetheirorigin.MineralcompositionofaerosolparticleswasinvestigatedatAksu,Dunhuang,Yulin,TongliaoandChangwuduringanintensivefieldcampaignperiodofACE-Asia.Theresultsshowthatthekaolinite(K)tochlorite(C)ratioissensitivetotheregionaloriginofAsiandust.Westernsourceareas(representedbyAksu)displayedthelowestK/Cratioof0.3(average),whileitwasfoundtoincreaseupto0.70(average)uponmovingtowardsnorthernsourceareas(representedbyYulin).BystudyingtransporteddustinadepositionarearepresentativeoftheChineseLoessPlateau,theusefulnessoftheK/Cratio,whenassociatedwithbackair-masstrajectories,wasfoundtolieinrevealingtheoriginofthedust.ComparisonofthemineralogicaldatabetweenAsiandustandSaharadust,showsthattheK/Cratioisalsoaneffectivesignaturetoidentifythesourceareasonahemispherescale.

简介：

简介：在这份报纸，环境扫描电子显微镜学(ESEM)被用于描绘矿物质和处理残余(COPR)的铬铁矿矿石的元素分发。测试结果证明忍受Crbrownmillerite发生在COPR粒子的边界，当有在它的结构的Cr(VI)的hydroandradite在内介绍COPR粒子时。方镁石和方解石发生在空隙的区域。Ca，Fe和艾尔在整个COPR粒子是分布式的元素分析表演，和Mg主要在空隙的区域或在粒子表面上存在。Cr的一个更低的内容在COPR粒子是均匀地分布式的，当Cr的稍微更高的集中发生在粒子内时。让Cr从COPR移居将花一相对更长的时间，这被建议，特别为hexavalent铬，因此沥滤的时间和粒子尺寸可以是影响Cr(VI)的版本的二个重要因素。

简介：

简介：

简介：

简介：

简介：Withregardtothenumberofmineralspeciesfirstdis-coveredinaparticularcountry,Italyranksfourth,beingprecededonlybyUSA,RussiaandGermany.Importantrock-formingmineralslikeanalcime,anorthite,anortho-clase,antigorite,celadonite,diopside,dolomite,forsterite,humite,leucite,lime,lizardite,magnesiochlo-ritoid,magnesite,nepheline,andsepioliteareamongthe240speciesfirstdiscoveredinItaly.OthersignificantfirstItalianfindingsaresomeimportantindexmineralsoftheUHPmetamorphism(ellenbergerite,phosphoel-lenbergerite,magnesiodumortierite,andmagnesiostau-rolite;secondoccurrenceofcoesite)whichwerediscov-eredinthewell-knownandfirstreportedUHPoutcropoftheDora-MàiramassifItalyisalsothenativelandofabout30zeolitesandofthetwomostabundantmodernspecies:balangeroiteandcarlosturanite,whicharerock-formingasbestos-likemineralsofserpentinitesinthewesternAlps.

简介：Thebottomsedimentsamplesweregatheredduringislandinvestigationin1994andintheperiodofcarryingoutthenaturalsciencefundprojectofFujianin1999.Thecomposition,distributionandassemblagecharacteristicsofheavymineralswhichgranularitydistributesfrom0.063to0.125mminthesedimentfromJiulongRiverestuaryarestudiedinthepaper.Theresultsshowthatthereare49kindsofheavymineralsandtheaveragecontentofthemis9.38%.Thedominantandcharacteristicmineralsaremagnetite,hematite,epidote,ilmenite,limonite,hornblende,zircon,andalusite,biotiteandsoon.4mineralassemblagezones(Ⅰ.ThewatercoursegatewayofJiulongRivermineralzone,Ⅱ.ThenorthernestuaryofJiulongRivermineralzone,Ⅲ.Thesouthernestuarymineralzone,Ⅳ.TheeasternestuaryofJiulongRivermineralzone),canbedividedbasedontheheavymineralcontentsandthedistributioncharacteristics,whichnotonlyrelatestothemattersourcesbutalsoiscontrolledbyhydrodynamicconditionandthesedimentaryenvironmentintheJiulongRiverestuary.

简介：Heavymineralswithasizerangeof0.125～0.250mminthesurficialsedimentofMinjiangEstuaryarestudied.Thirty-fourheavymineralshavebeenidentified,withanaveragecontentof1.92%.Majormineralsincludemagnetite,epidote,hematite,hornblende,ilmenite,andzirconmica.Thesetypesarethesameasthoseinthe0.063～0.125mmrange;however,theaveragecontentislower,whichrevealsthattheheavymineralsinMinjiangEstuaryaremainlyenrichedinthevery-finesandfraction.Accordingtothecontentanddistributioncharacteristicsofthemajorheavyminerals,MinjiangEstuarycanbedividedinto4mineralassemblagezones.Ineachzonetheassemblageofheavymineralsisgreatlyaffectedbythehydrodynamicconditionandthesedimentaryenvironment.HeavymineraltypesalsoshowthatdetritalmattersinMinjiangEstuaryareoriginatedfromtheweatheringanderosionofthebedrockintheMinjiangRiverdrainagearea.

简介：TORMineralsInternational推出一种新二氧化钛（TiO2）颜料产品，超细Hitox-SF。该颜料用一种新专利方法生产，除降低成本外，还能增加公司Hitox产品的市场。

简介：Theflotabilityandmechanismofthecompositetantalite-niobitemineralswhichhavedifferentcontentoftheTa,Nb.Fe,Mnwithstyrenephosphonicacid（SPA）ascollectorareinvestigatedanddiscussed.Someimportantflotationparametersarefoundasfollows:SPAisabettercollectorforflotatingniobite-tantalitemineralthanother,theoptimumpHvalueinpulpislessthan5,theflotabilityofthosemineralsvarieswiththedifferentcontentofmineralcomposition,theflotabitityofthemineralswithhigherNb2O5contentisbetterthanthatwithhigherTa205content.HereweemphasizethatinwiderangeofpHinsolu-tiontheFe,Mnonthemineralsurfacesarethemainactivespeciesforflotationoftheseminerals.Inadditiontothis,someofre-searchworkbyusingAugerelectronspectroscopy,infraredspectroscopyandultravioletspectroscopyfordeterminingthesurfaceconditions,pretreatedbyacidornot,hasbeendone.ThecharacteristicsofadsorptionofSPAonthemineralsurfacesareexam-inedanddiscussed.ItisindicatedthattheSPAinteractswithFe,Mnionsonmineralsurfacesbythechemicalbondforce.Butonthewholeouterlayerofcollector,whichisnon-uniformmultilayer,itmaybesaidthattheadsorptionofSPAonthemineralsur-faceisbothchemico-adsorptionandphysico-adsorption,butthechemico-adsorptionispredominant.

简介：

简介：