# Search results of SQL query from the Crystallography Open Database # Date and time performed: 2026-02-08T21:09:13+01:00 # Query: # SELECT data.* # FROM # data # WHERE # (status is null or status != 'retracted') and # (year = 1918 AND duplicateof IS NULL AND (status is NULL OR status != 'errors') AND (method is NULL OR method != 'theoretical')) # ORDER BY file asc file,a,siga,b,sigb,c,sigc,alpha,sigalpha,beta,sigbeta,gamma,siggamma,vol,sigvol,celltemp,sigcelltemp,diffrtemp,sigdiffrtemp,cellpressure,sigcellpressure,diffrpressure,sigdiffrpressure,thermalhist,pressurehist,compoundsource,nel,sg,sgHall,sgNumber,commonname,chemname,mineral,formula,calcformula,cellformula,Z,Zprime,acce_code,authors,title,journal,year,volume,issue,firstpage,lastpage,doi,method,radiation,wavelength,radType,radSymbol,Rall,Robs,Rref,wRall,wRobs,wRref,RFsqd,RI,gofall,gofobs,gofgt,gofref,duplicateof,optimal,status,flags,svnrevision,date,time,onhold "1010439","4.74","","4.74","","6.65","","90","","90","","120","","129.4","","","","","","","","","","","","I","2","","","","","Ice","Ice","- H2 O -","","","4","","","John, A S","The Crystal Structure of Ice","Proceedings of the National Academy of Sciences, U.S.A.","1918","4","","193","197","10.1073/pnas.4.7.193","","","","","","","","","","","","","","","","","","","","","","201954","2020-10-21","18:00:00","" "1011031","4.358","","4.358","","4.358","","90","","90","","90","","82.8","","","","","","","","","","","","synthetic","2","F -4 3 m","F -4 2 3","216","","Silicon carbide","Moissanite 3C","- C Si -","- C Si -","- C4 Si4 -","4","0.0416667","","Burdick, C L; Owen, E A","The Atomic Structure of Carborundum Determined by X-Rays","Journal of the American Chemical Society","1918","40","","1749","1759","10.1021/ja02245a001","","","","","","","","","","","","","","","","","","","","","has coordinates","278158","2022-09-26","15:28:11",""