Platinum (Var: Polyxene) : (Pt,Fe,Cu,Ni,Pd,Rh), Isoferroplatinum : Pt3Fe, Gold : Au, Magnesiochromite : MgCr2O4
How to use the mindat.org media viewer
Click/touch this help panel to close it.
Welcome to the mindat.org media viewer. Here is a quick guide to some of the options available to you. Different controls are available depending on the type of media being shown (photo, video, animation, 3d image)
Controls - all media types
Zoom in and out of media using your mousewheel or with a two-finger 'resize' action on a touch device.
Use the mouse or your finger to drag the image or the view area of the image around the screen.
< and > at the left and right hand side of the screen move forwards and backwards for the other images associated with the media you selected. Usually this is for further photos of the same specimen. Keyboard shortcuts: use the left and right arrow keys.
> in the bottom center, raises the information box giving details and further options for the media, < at the top of this box then hides it. Keyboard shortcuts: use the up and down arrow keys.
? opens this help window. Keyboard shortcuts: use the H key or the ? key.
Other keyboard shortcuts:
| 1 | Fit image to screen |
| 2 | Fill screen with image |
| 5 | Display at full resolution |
| < | Make background darker |
| > | Make background lighter |
| space | Hide/dim titles and buttons |
Controls - Video
Video files have a standard set of video controls: 
- Reset to start, 
- Skip back, 
- Play, 
- Pause, 
- Skip forwards. Keyboard shortcuts: You can stop/start video play with the P key.
Controls - Animation (Spin Rotation)
Animation (usually 360 degree spin rotations) have their own controls: 
- enable spin mode. Note that while images are loading this option will not be available but will be automatically activated when the animation has loaded. Once active you can spin the image/change the animation by moving your mouse or finger on the image left/right or by pressing the [ or ] keys.
The 
button switches to move mode so that you can use your mouse/fingers to move the image around the screen as with other media types.
The button, or the P key will start playing the animation directly, you can interrupt this by using the mouse or finger on the image to regain manual movement control.
Controls - 3D Stereoscopic images
Stereoscopic 3D image viewing requires a suitable 3D television or monitor correctly configured for your computer. Passive 3D systems such as LG 3DTVs are the easiest to configure for this.
To enable/disable 3D stereo display of a compatible stereo pair image press the 3 key. If the left/right images are reversed on your display (this often happens in full-screen mode) press the 4 key to reverse them.
Summary of all keyboard shortcuts
| 1 | Fit image to screen |
| 2 | Fill screen with image |
| 3 | Switch to 3D display of stereo pair |
| 4 | Switch left/right images in 3D mode |
| 5 | Display at full resolution |
| <, > | Make background darker/lighter |
| H or ? | Show/hide this help page |
| P | Play/Pause Video or Animation |
| [, ] | Backwards/forwards one frame (Animation only) |
| up arrow | Show information box |
| down arrow | Hide information box |
| left arrow | Previous image/media page |
| right arrow | Next image/media page |
| space | Hide/dim titles and buttons |
Platinum (Var: Polyxene) : (Pt,Fe,Cu,Ni,Pd,Rh), Isoferroplatinum : Pt3Fe, Gold : Au, Magnesiochromite : MgCr2O4
Other Views - click to switch
Ferroplatinum is represented here by two inrecognizable by naked eye minerals - Polyxene and Isoferroplatinum. Polyxene has composition Pt 92.05/92.75, Pd 0.75/0.50, Fe 5.83/6.02, Cu 1.29/0.50 mas.%, what may to be expressed by formulae (Pt0.78Fe0.17Cu0.03Pd0.01) / (Pt0.80Fe0.18Cu0.01Pd0.01). This is low ferroan Polyxene, what is unusual. May be it is of secondary origin and was formed during oxidation of iron from Isoferroplatinum.
Isoferroplatinum has composition Pt 87.53/88.84, Ir 1.99/0.64, Rh 0.48/0.00, Pd 0.35/0.20, Fe 9.03/9.75, Cu 0.63/0.57 mas.%, what may to be expressed by formulae (Pt2.81Ir0.07Cu0.06Rh0.03Pd0.02)2.99Fe1.01 / (Pt2.84Cu0.04Ir0.04)2.92Fe1.08.
Due to different iron contents in these two minerals, they able to be separated by magnites.
The brightmost rare tin-white grains are native Iridium with composition (Ir0.86Os0.10Ru0.03Pt0.01).
Invisible at the photo minerals of the concentrate are represented by black Laurite and Erlichmanite crystals, Pyrite, Zircon, Magnetite crusts over Magnesiochromite crystals.
Pavel M. Kartashov analytical data, collection and photo.
This photo has been shown 112 times