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/diy/ - Do It Yourself

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File: 306 KB, 1237x1039, IMG_3274.jpg [View same] [iqdb] [saucenao] [google]
2811027 No.2811027 [Reply] [Original]

Hello, I have a sample of metal that I can’t identify.
I’m thinking it’s some alloy or something, since it doesn’t match bismuth or other metals.

It is very brittle and non-ductile, files and sandpaper easily expose its shiny surface under the orangish yellow sheen on the surface so it isn’t tough.

It is not ferromagnetic or responsive to magnets.

On the fragments with the exposed interior, it makes sharp edges and has a dull lustre

Can anyone identify this metal?

>> No.2811046

Put it in water and tell us what happens

>> No.2811049

Weigh it
Then measure its water displacement
Then we can narrow it down by density
If you have a multimeter laying around, tell us its resistance

>> No.2811050

If it was magnesium or sodium or the other alkali series metals then it would’ve just combusted upon touching water vapour in the air when I exposed its surface, pretty sure that this isn’t a reactive alkali metal.

>> No.2811051

Measuring resistance sounds alright, I’ll try that out.
As for displacement I don’t have a graduated cylinder to be precise with.

but I’ll go use the kitchen scale to weigh it too provided that the batteries aren’t dead

>> No.2811061

Kitchen scale doesn’t give a reading since the metal pieces are too light, a Canadian quarter reads 4 grams and both pieces are smaller than the quarter

Multimeter on 200 ohm setting reads 0.08 - 0.07 +- 2.5% + 5 which I assume to be 1.6-1.4 ohm respectively

>> No.2811071

fool's gold

>> No.2811089
File: 245 KB, 1280x852, Pyrite_huaron_octaedre.jpg [View same] [iqdb] [saucenao] [google]

Looks like pyrite at first glance. Will smell foul and turn to iron if you melt it. You can try heating it up bits of it with a torch and if it smells like rotten eggs then you know it's pyrite.

>> No.2811103

does it react to acid?

>> No.2811108
File: 161 KB, 1024x540, siliconmetal.jpg [View same] [iqdb] [saucenao] [google]

Silicon metal, maybe

Not sure if it can get orange-y or not

>> No.2812538

Shit is that what that stuff was? When I was little we had a gravel driveway and my parents would get a white "slag" put on it by the ton when it started to get muddy and it would have chunks of silvery brittle rocks occasionally mixed in.

>> No.2812628

Yep, I have a bucket of it that I picked up around the railroad track here

>> No.2813246


>> No.2813269

Like >>2811089 says it's possible that it's a sulfide mineral like pyrite and not a metal. Sulfides are soft, brittle, shiny, reactive with air, and semiconductive.