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. 2017 Mar 10;7:44144. doi: 10.1038/srep44144

Table 1. Notations of YS-phases and database entries correlated with them due to matching crystallographic data.

Y2Si2O7 type+database files symmetry space group (number) lattice parameters [Å] angles [°] Ref.
a b c α β γ
α-type triclinic Inline graphic (2) 6.584 6.643 12.390 93.65 89.81 91.17 30
JCPDS 38-0223 triclinic Inline graphic (2) 6.590 6.640 12.250 94.00 89.20    
ICSD 164148 triclinic Inline graphic (2) 6.588 6.639 12.031 94.48 90.95 91.80  
ICSD 173383 triclinic Inline graphic (2) 6.586 6.628 12.027 94.47 89.07 88.13  
β–type monoclinic C2/m (12) 6.845 9.139 4.687   100.57   30
JCPDS 38-0440 monoclinic C2/m (12) 6.875 8.970 4.721   101.74    
ICSD 281312 monoclinic C2/m (12) 6.869 8.960 4.716   101.73    
ICSD 281313 monoclinic C2/m (12) 6.867 8.959 4.717   101.72    
γ–type monoclinic P21/a (14) 5.610 10.833 4.690   95.72   30
JCPDS 42-0167 monoclinic P21/a (14) 5.579 10.857 4.696   95,99    
ICSD 28212 monoclinic P21/a (14) 5.540 10.780 4.66   96.10    
ICSD 164147 monoclinic P 21/c (14) 4.688 10.840 5.582   96.03    
δ–type orthorh. Pnam (62) 13.671 5.017 8.015       30
JCPDS 76-0204 orthorh. Pnam (62) 13.665 5.016 8.139        
JCPDS 42-0168 orthorh. Pnam (62) 8.152 13.660 5.020        
ICSD 33721 orthorh. Pnam (62) 13.665 5.016 8.139        
ε–type monoclinic P21/m (11) 7.503 8.063 5.022   112.05   30
JCPDS 74-1994 monoclinic P21/m (11) 7.500 8.060 5.020   112.00    
ICSD 28004 monoclinic P 21/m (11) 7.503 8.063 5.022   112.05    
ζ–type monoclinic P21/m (11) 5.034 8.064 7.326   108.63   30
ICSD 416573 monoclinic P21/m (11) 5.036 8.064 7.326   108.63    
η–type triclinic Inline graphic (2) 6.629 6.584 35.916 91.090 94.53 91.73 31
ICSD 173268 triclinic Inline graphic (2) 6.629 6.584 35.916 91.090 94.53 91.73  
z-type n.A. n.A. n.A. n.A. n.A. n.A. n.A. n.A. 32
JCPDS 21-1459 n.A. n.A. n.A. n.A. n.A. n.A. n.A. n.A.