perovskite atlas Structures, modes and phase transitions · Josu M. Igartua · UPV/EHU

Refined crystal structure of BaPr2CuTi2O9 at 300 K, I4/mcm

Refined crystal structure of BaPr2CuTi2O9 at 300 K, I4/mcm

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9 keys }
  "id""str:bapr2cuti2o9.i4mcm.300k.iturbe2012"
  "changelog" 1 items ],
     3 keys }
      "timestamp""2026-09-30T05:59:03+00:00"
      "user""perovskite-atlas/fer_export.py"
      "description""Refined structure. Generated from atlas records at git 98609f0."
    
  
  "description""Refined crystal structure of BaPr2CuTi2O9 at 300 K, I4/mcm"
  "correct"true
  "state" 1 items ],
     3 keys }
      "name""temperature"
      "description""conditions of the refined structure"
      "quantity_value" 9 keys }
        "id""str:bapr2cuti2o9.i4mcm.300k.iturbe2012#T"
        "name""Temperature"
        "description""Temperature of the measurement as reported (uncertainty not reported)"
        "quantities""Temperature"
        "symbols""$T$"
        "units""K"
        "values" 1 items ],
          300.0
        
        "standard_uncertainties" 1 items ],
          0.0
        
        "atlas" 2 keys }
          "uncertainty_reported"false
          "reported_as""300"
        
      
    
  
  "results" 6 items ],
     9 keys },
      "id""str:bapr2cuti2o9.i4mcm.300k.iturbe2012#cell"
      "name""Unit cell"
      "description""Cell parameters, space group I4/mcm (No. 140)"
      "quantities""a""b""c""alpha""beta""gamma"
      "symbols""$a$""$b$""$c$""$\\alpha$""$\\beta$""$\\gamma$"
      "units""Å""Å""Å""°""°""°"
      "values" 6 items ],
        5.5837
        5.5837
        7.8882
        90.0
        90.0
        90.0
      
      "standard_uncertainties" 6 items ],
        0.0002
        0.0002
        0.0005
        0.0
        0.0
        0.0
      
      "atlas" 2 keys }
        "uncertainty_reported"truetruetruefalsefalsefalse
        "reported_as""5.5837(2)""5.5837(2)""7.8882(5)""90""90""90"
      
    
     9 keys },
      "id""str:bapr2cuti2o9.i4mcm.300k.iturbe2012#atom:Ba/Pr"
      "name""Atom Ba/Pr (Ba, Wyckoff 4b)"
      "description""Fractional coordinates and isotropic displacement; occupancy 0.35/0.65"
      "quantities""x""y""z""B_iso"
      "symbols""$x$""$y$""$z$""$B_{\\mathrm{iso}}$"
      "units""1""1""1""Å^2"
      "values" 4 items ],
        0.0
        0.5
        0.25
        2.64
      
      "standard_uncertainties" 4 items ],
        0.0
        0.0
        0.0
        0.09
      
      "atlas" 2 keys }
        "uncertainty_reported"falsefalsefalsetrue
        "reported_as""0""0.5""0.25""2.64(9)"
      
    
     9 keys },
      "id""str:bapr2cuti2o9.i4mcm.300k.iturbe2012#atom:Cu/Ti"
      "name""Atom Cu/Ti (Cu, Wyckoff 4c)"
      "description""Fractional coordinates and isotropic displacement; occupancy 0.35/0.65"
      "quantities""x""y""z""B_iso"
      "symbols""$x$""$y$""$z$""$B_{\\mathrm{iso}}$"
      "units""1""1""1""Å^2"
      "values" 4 items ],
        0.0
        0.0
        0.0
        2.0
      
      "standard_uncertainties" 4 items ],
        0.0
        0.0
        0.0
        0.2
      
      "atlas" 2 keys }
        "uncertainty_reported"falsefalsefalsetrue
        "reported_as""0""0""0""2.0(2)"
      
    
     9 keys },
      "id""str:bapr2cuti2o9.i4mcm.300k.iturbe2012#atom:O1"
      "name""Atom O1 (O, Wyckoff 4a)"
      "description""Fractional coordinates and isotropic displacement; occupancy 1"
      "quantities""x""y""z""B_iso"
      "symbols""$x$""$y$""$z$""$B_{\\mathrm{iso}}$"
      "units""1""1""1""Å^2"
      "values" 4 items ],
        0.0
        0.0
        0.25
        6.6
      
      "standard_uncertainties" 4 items ],
        0.0
        0.0
        0.0
        0.6000000000000001
      
      "atlas" 2 keys }
        "uncertainty_reported"falsefalsefalsetrue
        "reported_as""0""0""0.25""6.6(6)"
      
    
     9 keys },
      "id""str:bapr2cuti2o9.i4mcm.300k.iturbe2012#atom:O2"
      "name""Atom O2 (O, Wyckoff 8h)"
      "description""Fractional coordinates and isotropic displacement; occupancy 1"
      "quantities""x""y""z""B_iso"
      "symbols""$x$""$y$""$z$""$B_{\\mathrm{iso}}$"
      "units""1""1""1""Å^2"
      "values" 4 items ],
        0.275
        0.225
        0.0
        6.6
      
      "standard_uncertainties" 4 items ],
        0.005
        0.005
        0.0
        0.6000000000000001
      
      "atlas" 2 keys }
        "uncertainty_reported"truetruefalsetrue
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     9 keys }
      "id""str:bapr2cuti2o9.i4mcm.300k.iturbe2012#reliability"
      "name""Rietveld reliability factors"
      "description""As reported; no uncertainties"
      "quantities""chi2"
      "symbols""$\\chi^2$"
      "units""1"
      "values" 1 items ],
        2.8
      
      "standard_uncertainties" 1 items ],
        0.0
      
      "atlas" 2 keys }
        "uncertainty_reported"false
        "reported_as""2.8"
      
    
  
  "measurands""unit cell""atomic coordinates""displacement parameters"
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    "id""ref:bapr2cuti2o9.i4mcm.300k.iturbe2012.all-modes"
    "name""Rietveld refinement (FullProf, symmetry-mode)"
    "description"""
    "model""Least-squares Rietveld refinement of the powder pattern; symmetry-mode parametrisation where method = symmetry-mode; variant all-modes"
    "influence_quantities" 1 items ],
       9 keys }
        "id""str:bapr2cuti2o9.i4mcm.300k.iturbe2012#T"
        "name""Temperature"
        "description""Temperature of the measurement as reported (uncertainty not reported)"
        "quantities""Temperature"
        "symbols""$T$"
        "units""K"
        "values" 1 items ],
          300.0
        
        "standard_uncertainties" 1 items ],
          0.0
        
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          "uncertainty_reported"false
          "reported_as""300"
        
      
    
    "input_quantities" 1 items ]
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        "changelog" 1 items ],
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            "timestamp""2026-09-30T05:59:03+00:00"
            "user""perovskite-atlas/fer_export.py"
            "description""Dataset stub. Generated from atlas records at git 98609f0."
          
        
        "description""XRPD pattern of mat:bapr2cuti2o9 at 300 K on Laboratory X-ray powder diffractometer (Cu Kα) (UPV/EHU)"
        "correct"true
        "state"
        "results"
        "measurands""diffraction pattern"
        "source" 6 keys },
          "id""ins:lab-xrd"
          "name""Laboratory X-ray powder diffractometer (Cu Kα)"
          "description"""
          "model""powder diffraction"
          "influence_quantities"
          "input_quantities"
        
        "atlas" 5 keys }
          "record_id""dat:bapr2cuti2o9.iturbe2012.xrpd.rt"
          "status""published"
          "evidence" 1 items ],
             4 keys }
              "doc""doc:thesis-03"
              "md_line"2120
              "table""10.2"
              "status""thesis-only"
            
          
          "atlas_schema_version""0.1"
          "note""raw pattern not yet attached; results are empty by design until data rescue"
        
      
    
  
  "atlas" 5 keys }
    "record_id""str:bapr2cuti2o9.i4mcm.300k.iturbe2012"
    "status""published"
    "evidence" 1 items ],
       4 keys }
        "doc""doc:thesis-03"
        "md_line"2120
        "table""10.2"
        "status""thesis-only"
      
    
    "atlas_schema_version""0.1"
    "refinement" 4 keys }
      "record_id""ref:bapr2cuti2o9.i4mcm.300k.iturbe2012.all-modes"
      "status""published"
      "evidence" 1 items ],
         4 keys }
          "doc""doc:thesis-03"
          "md_line"2120
          "table""10.2"
          "status""thesis-only"
        
      
      "atlas_schema_version""0.1"
    
  

id str:bapr2cuti2o9.i4mcm.300k.iturbe2012 · correct true · measurands unit cell, atomic coordinates, displacement parameters

State

Temperature · Temperature of the measurement as reported (uncertainty not reported)

quantity symbol value u (standard) unit
Temperature T 300 0 K not reported

Results

Unit cell · Cell parameters, space group I4/mcm (No. 140)

quantity symbol value u (standard) unit
a a 5.5837 0.0002 Å
b b 5.5837 0.0002 Å
c c 7.8882 0.0005 Å
alpha \alpha 90 0 ° not reported
beta \beta 90 0 ° not reported
gamma \gamma 90 0 ° not reported

Atom Ba/Pr (Ba, Wyckoff 4b) · Fractional coordinates and isotropic displacement; occupancy 0.35/0.65

quantity symbol value u (standard) unit
x x 0 0 not reported
y y 0.5 0 not reported
z z 0.25 0 not reported
B_iso B_{\mathrm{iso}} 2.64 0.09 Ų

Atom Cu/Ti (Cu, Wyckoff 4c) · Fractional coordinates and isotropic displacement; occupancy 0.35/0.65

quantity symbol value u (standard) unit
x x 0 0 not reported
y y 0 0 not reported
z z 0 0 not reported
B_iso B_{\mathrm{iso}} 2.0 0.2 Ų

Atom O1 (O, Wyckoff 4a) · Fractional coordinates and isotropic displacement; occupancy 1

quantity symbol value u (standard) unit
x x 0 0 not reported
y y 0 0 not reported
z z 0.25 0 not reported
B_iso B_{\mathrm{iso}} 6.6 0.6 Ų

Atom O2 (O, Wyckoff 8h) · Fractional coordinates and isotropic displacement; occupancy 1

quantity symbol value u (standard) unit
x x 0.275 0.005
y y 0.225 0.005
z z 0 0 not reported
B_iso B_{\mathrm{iso}} 6.6 0.6 Ų

Rietveld reliability factors · As reported; no uncertainties

quantity symbol value u (standard) unit
chi2 \chi^2 2.8 0 not reported

Source

Rietveld refinement (FullProf, symmetry-mode) · model: Least-squares Rietveld refinement of the powder pattern; symmetry-mode parametrisation where method = symmetry-mode; variant all-modes

Influence quantities

Temperature · Temperature of the measurement as reported (uncertainty not reported)

quantity symbol value u (standard) unit
Temperature T 300 0 K not reported

Input quantities

dat:bapr2cuti2o9.iturbe2012.xrpd.rt · XRPD pattern of mat:bapr2cuti2o9 at 300 K on Laboratory X-ray powder diffractometer (Cu Kα) (UPV/EHU)

id dat:bapr2cuti2o9.iturbe2012.xrpd.rt · correct true · measurands diffraction pattern

Results

Empty (no results attached yet).

Source

Laboratory X-ray powder diffractometer (Cu Kα) · model: powder diffraction

Changelog

timestamp user description
2026-09-30T05:59:03+00:00 perovskite-atlas/fer_export.py Dataset stub. Generated from atlas records at git 98609f0.

Changelog

timestamp user description
2026-09-30T05:59:03+00:00 perovskite-atlas/fer_export.py Refined structure. Generated from atlas records at git 98609f0.

Atlas extension

record str:bapr2cuti2o9.i4mcm.300k.iturbe2012 · status published