See what you will probably never see in reality, thanks to the PCOD
Two-dimensional SiO2 models (not DFT-optimized) as predicted
by GRINSP
They can be porous too...
Models selected among 11157 CIF including 3D, 2D and 1D
SiO2
To be compared to the 4 models in a 2017 paper
Not exhaustive list (much more will be added during the next weeks)...
References for these predictions :
1- Inorganic structure prediction with GRINSP. A. Le Bail, J. Appl. Cryst.
38 (2005) 389-395. http://journals.iucr.org/j/issues/2005/02/00/cg5019/
2- Predicted corner-sharing titanium silicates. A. Le Bail, Z. Kristallogr.,
Suppl. 26 (2007) 203-208. https://www.researchgate.net/publication/228093494_Predicted_corner-sharing_titanium_silicates
3- Powerpoint file : Contribution to the "Gordon Conference Style" Workshop
: Global Optimisation Techniques Applied to the Prediction of Structures,
5-7 July 2006, University College London (.ppt
or zipped)
4- Advances in structure prediction of inorganic compounds. A. Le Bail,
Report of 2nd Algerian Crystallography Congress, Algérie (2005). http://arxiv.org/abs/cond-mat/0606025
5- Hypothetical AlF3 crystal structures, A. Le Bail, F.
Calvayrac, J. Solid State Chem., 179 (2006) 3159-3166.
6- Inorganic structure prediction: too much and not enough, A. Le Bail,
Solid State Phenomena 130 (2007) 1-6.
7- Frontiers between crystal structure prediction and determination by
powder diffractometry, A. Le Bail, Powder Diffraction, S23 (2008) S5-S12.
8- Databases of virtual inorganic crystal structures and their applications,
A. Le Bail, Phys. Chem. Chem. Phys. 12 (2010) 8521-8530. DOI:
10.1039/c003907c
Etc - search by yourself after all...
A- Simplest models : two-sheets-related-by-a-mirror
PCOD3007286 (α-2D-silica in the paper cited above) CIF
PCOD670014 - close to the previous one but not exactly - CIF
![](670014-1.jpg)
PCOD1000004 CIF
![](1000004-1.jpg)
PCOD900003 CIF
PCOD3003217 CIF
![](3003217-1.jpg)
PCOD3000624 CIF
![](3000624-1.jpg)
PCOD3005178 CIF
![](3005178-1.jpg)
PCOD3005151 CIF
![](3005151-1.jpg)
PCOD3000966 CIF
![](3000966-1.jpg)
PCOD3010877 CIF
![](3010877-1.jpg)
PCOD3009033 CIF
![](3009033-1.jpg)
B- More complex models, though the first three are one-sheet thick :
PCOD1150104 (δ-2D-silica in the paper cited above) CIF
![](1150104-1.jpg)
PCOD1000001 (β-2D-silica in the paper cited above) CIF
![](1000001-1.jpg)
PCOD740002 another organization similar to the two previous ones - CIF
![](740002-1.jpg)
PCOD1150331 (γ-2D-silica in the paper cited above) CIF
![](1150331-1.jpg)
PCOD3004329 CIF
![](3004329-1.jpg)
PCOD3007243 CIF
![](3007243-1.jpg)
PCOD3004896 CIF
![](3004896-1.jpg)
PCOD3003565 CIF
![](3003565-1.jpg)
PCOD3008767 CIF
![](3008767-1.jpg)
PCOD3009099 CIF
![](3009099-1.jpg)
PCOD3007213 CIF
![](3007213-1.jpg)
PCOD3009950 CIF
![](3009950-1.jpg)
PCOD670009 CIF
![](670009-1.jpg)
PCOD3000213 CIF
![](3000213-1.jpg)
PCOD3003939 CIF
![](3003939-1.jpg)
PCOD3003044 CIF
![](3003044-1.jpg)
PCOD3002966 CIF
![](3002966-1.jpg)
PCOD3003929 CIF
![](3003929-1.jpg)
PCOD3003930 CIF
![](3003930-1.jpg)
PCOD3003372 CIF
![](3003372-1.jpg)
PCOD3001602 CIF
![](3001602-1.jpg)
PCOD3004060 CIF
![](3004060-1.jpg)
PCOD3003566 CIF
![](3003566-1.jpg)
PCOD3001752 CIF
![](3001752-1.jpg)
PCOD3004760 CIF
![](3004760-1.jpg)
PCOD3004939 CIF
![](3004939-1.jpg)
PCOD3001747 CIF
![](3001747-1.jpg)
PCOD3003932 CIF
![](3003932-1.jpg)
PCOD3001268 CIF
![](3001268-1.jpg)
PCOD3004529 CIF
![](3004529-1.jpg)
PCOD3101399 CIF
![](3101399-1.jpg)
PCOD3103687 CIF
![](3103687-1.jpg)
PCOD3103321 CIF
![](3103321-1.jpg)
PCOD3102839 CIF
![](3102839-1.jpg)
![](3102839-2.jpg)
PCOD3102426 CIF
PCOD3102120 CIF
![](3102120-1.jpg)
PCOD3000230 CIF
![](3000230-1.jpg)
PCOD3103838 CIF
PCOD3002076 CIF
![](3002076-1.jpg)
PCOD3102266 CIF
PCOD3103126 CIF
![](3103126-1.jpg)
![](3103126-2.jpg)
PCOD3100471 CIF
![](3100471-1.jpg)
PCOD3102255 CIF
PCOD3100607 CIF
PCOD3100282 CIF
![](3100282-1.jpg)
PCOD3102142 CIF
![](3102142-1.jpg)
3109046 CIF
PCOD3109269 CIF
![](3109269-1.jpg)
PCOD3103474 CIF
![](3103474-1.jpg)
PCOD3109101 CIF
![](3109101-1.jpg)
PCOD3108373 CIF
![](3108373-1.jpg)
PCOD3103427 CIF
PCOD3009735 CIF
![](3009735-1.jpg)
PCOD3004909 CIF
![](3004909-1.jpg)
PCOD3004748 CIF
![](3004748-1.jpg)
PCOD3003951 CIF
![](3003951-1.jpg)
PCOD3002753 CIF
![](3002753-1.jpg)
PCOD3000993 CIF
![](3000993-1.jpg)
PCOD3010514 CIF
![](3010514-1.jpg)
PCOD3003465 CIF
![](3003465-1.jpg)
PCOD3004081 CIF
![](3004081-1.jpg)
PCOD3010207 CIF
![](3010207-1.jpg)
PCOD3003574 CIF
![](3003574-1.jpg)
PCOD3002531 CIF
![](3002531-1.jpg)
![](3002531-2.jpg)
PCOD3008346 CIF
![](3008346-1.jpg)
![](3008346-2.jpg)
PCOD3006321 CIF
![](3006321-1.jpg)
PCOD3005542 CIF
![](3005542-1.jpg)
![](3005542-2.jpg)
PCOD3009879 CIF
![](3009879-1.jpg)
PCOD3006169 CIF
![](3006169-1.jpg)
PCOD3005024 CIF
![](3005024-1.jpg)
![](3005024-2.jpg)
PCOD3003940 CIF
![](3003940-1.jpg)
PCOD3004579 CIF
![](3004579-1.jpg)
PCOD3010545 CIF
![](3010545-1.jpg)
![](3010545-2.jpg)
PCOD3004082 CIF
![](3004082-1.jpg)
PCOD3006182 CIF
![](3006182-1.jpg)
![](3006182-2.jpg)
PCOD3002971 CIF
![](3002971-1.jpg)
PCOD3002967 CIF
![](3002967-1.jpg)
PCOD3004799 CIF
![](3004799-1.jpg)
PCOD3010502 CIF
![](3010502-1.jpg)
![](3010502-2.jpg)
PCOD3003927 CIF
![](3003927-1.jpg)
PCOD3005359 CIF
![](3005359-1.jpg)
PCOD3007362 CIF
![](3007362-1.jpg)