Is the 'central Tin atom' in crystalline tin oxide really offset like this?

Is the position of the central Tin atom as shown in the first figure ($\ce{SnO2}$) drawn offset towards the oxygen to the right for a reason? The oxygen also seems to reciprocate and move towards the tin. Usually the rutile structure is shown as symmetric with the metal the center. I'm showing a GIF alternating images of $\ce{SnO2}$ and $\ce{RuO2}$, with complete image source information following.

note: I'm interested to know about the locations of the atoms within a unit cell as determined by crystallographic information - not one's impression of the drawing. I'd like to know if the offset shown in the drawing is there to represent an actual asymmetry, or if it's just an error.

Figure 1. Tin Dioxide (Tin IV oxide), also found as Cassiterite, image from Rutile unit cell 3D balls.

Figure 2. Ruthenium(IV) oxide, image from Ruthenium(IV) oxide unit cell 3D vdW.

Figure 3. Rutile structure, image from Rutile structure

Fig. 1

Fig. 2

Fig. 3

• I can't find any information which suggests that the Sn atom at the centre is not at (0.5, 0.5, 0.5). The unit cell parameters are slightly different, and the oxygens are shifted by a very tiny bit (the oxygens are at (x,x,0), (1-x,1-x,0), (0.5+x, 0.5-x, 0.5), (0.5-x,0.5+x,0.5), and x = 0.305 for TiO2 and 0.307 for SnO2) but nothing on the tin atoms. – orthocresol May 2 '17 at 12:20
• @orthocresol "nothing" means (0,0,0), (0.5, 0.5, 0.5), or nothing as in no mention of the location of the tins? I'm asking this to personally learn more on the subject, and it seems that there should be some sort of symmetry argument against (0,0,0), (0.5, 0.6, 0.6) for a crude example - the unit cell would have a net direction and the material might show particular optical or dielectric behavior. Answer that included a non-paywalled way to see the numbers you are seeing would be greatly appreciated! Also there's still this question... chemistry.stackexchange.com/q/73254/16035 – uhoh May 2 '17 at 12:36
• @orthocresol Also I realized that that the unique motion of the one oxygen atom on the right could not be explained with the simple expression in your comment, so I have a hunch you've got the answer. – uhoh May 2 '17 at 12:38
• No mention of the location of the tins, so I expect it to be the usual (0,0,0) + (0.5,0.5,0.5). I don't know much about it, I just flipped through the books that I had. It's in A.R. West "Solid State Chemistry and Applications" – orthocresol May 2 '17 at 12:47
• The tin is not offset. Likely the images have been distorted. – Jon Custer May 2 '17 at 13:53

From http://www.crystallography.net/cod/1000062.html one can see that Sn sits in the middle, without any displacement, and mimics the classic Rutile-type structure:

I checked original Wikimedia image, and according to metadata