# Search results of SQL query from the Crystallography Open Database
# Date and time performed: 2026-03-07T13:06:46+01:00
# Query:
# SELECT data.*
# FROM
#  data 
# WHERE
#  (status is null or status != 'retracted') and
#  (sg LIKE 'C 1 21 1' 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
"9006967","8.756","","5.0108","","8.2153","","90","","90.2825","","90","","360.438","","","","423.15","","","","","","","","","2","C 1 21 1","","","","","Tridymite","- O2 Si -","- O2 Si -","- O16 Si8 -","8","","","Graetsch, H.","X-ray powder diffraction study on the modulated high temperature forms of SiO2 tridymite between 110 and 220 C Sample: T = 150 C Locality: synthetic","Physics and Chemistry of Minerals","2001","28","","313","321","10.1007/s002690100160","","","","","","","","","","","","","","","","","","","","","has coordinates","291455","2024-05-02","11:21:03",""