Got to thinking about the manufactured elements bit in this thread, and how it could apply as a precise instrument that the Imperium could harness-
Currency.
Think about it- one of the problems of any commodity-based currency is that a major strike or new ore processing technique could depress the market, or too little of the currency is available for expansion.
Or limited quantities or increased prices of the component metals makes debasement practically required.
https://en.wikipedia.org/wiki/Debasement
But if a specific polity MAKES it, they can make precisely X amount of the currency to go around to match the actual needs of the economy, and assuming the technique is either safeguarded or too expensive, it won't be counterfeited.
It also occurs to me that a very precise half-life could serve as a sort of 'stamp' on when a bar of currency was 'minted'.
So what should our currency properties be?
- It should be readily recognizable by look, weight and feel.
- It should have slight radioactivity for the 'stamp' but no worse
- It should be highly stable, durable and portable
- It should have minimal use in industry
- It should only be able to be made near the top of the TL of the polity and a state secret as long as possible
- It should be easily tested for purity and against 'shaving'
- It should be stabilized at a specific price per gram- I would suggest 50 Cr per gram.
So 1 kg of coin/bar is 50,000 Cr. The average person could carry 350,000 Cr. A US nickel is 5 grams so the 250 Cr piece would weigh about the same.
A 1% alloy would be .5 Cr per gram for the smaller denominations. The 1 Cr coin comes in at about 2 grams, a bit lighter then a US dime or penny.