# Rare earth oxides

Pyanodons item · internal name `reo` · stack size 100 · first craftable in tier 2 (Logistic science pack, [tier 2](https://factorio.kalzumeus.com/tier/2.md))
HTML page: https://factorio.kalzumeus.com/item/reo/

## Produced by (1 recipes)

### Rare earth oxides (`reo`)

- 5 s · tier 2 · productivity modules allowed
- Ingredients: 10 × [Rare earth concentrate](https://factorio.kalzumeus.com/item/ree-concentrate.md)
- Results: 2 × [Iron oxide](https://factorio.kalzumeus.com/item/iron-oxide.md), 5 × [Rare earth oxides](https://factorio.kalzumeus.com/item/reo.md)
- Made in: Solid separator MK 01, Solid separator MK 02, Solid separator MK 03, Solid separator MK 04
- Unlocked by: [Rare earth technology](https://factorio.kalzumeus.com/tech/rare-earth-tech.md)

## Used in (17 recipes)

- Cobalt fluoride (`cobalt-fluoride`, tier 2) → [Cobalt fluoride](https://factorio.kalzumeus.com/item/cobalt-fluoride.md)
- Quartz tube (`quartz-tube`, tier 2) → [Quartz tube](https://factorio.kalzumeus.com/item/quartz-tube.md)
- Diodes (`diode`, tier 4) → [Diodes](https://factorio.kalzumeus.com/item/diode.md)
- Heavily n-doped silicon (`heavy-n`, tier 4) → [Heavily n-doped silicon](https://factorio.kalzumeus.com/item/heavy-n.md)
- MOSFET (`mosfet`, tier 4) → [MOSFET](https://factorio.kalzumeus.com/item/mosfet.md)
- Neodymium ferroboron alloy (`hotair-ndfeb-alloy`, tier 5) → [Neodymium ferroboron alloy](https://factorio.kalzumeus.com/item/ndfeb-alloy.md)
- Neodymium ferroboron alloy (`ndfeb-alloy`, tier 5) → [Neodymium ferroboron alloy](https://factorio.kalzumeus.com/item/ndfeb-alloy.md)
- Tin rare earth alloy (`hotair-re-tin`, tier 5) → [Tin rare earth alloy](https://factorio.kalzumeus.com/item/re-tin.md)
- Tin rare earth alloy (`re-tin`, tier 5) → [Tin rare earth alloy](https://factorio.kalzumeus.com/item/re-tin.md)
- Gallium arsenide (`gaas`, tier 7) → [Gallium arsenide](https://factorio.kalzumeus.com/item/gaas.md)
- Heavy fermion material (`heavy-fermion`, tier 7) → [Heavy fermion material](https://factorio.kalzumeus.com/item/heavy-fermion.md)
- InGaP (`ingap`, tier 7) → [InGaP](https://factorio.kalzumeus.com/item/ingap.md)
- Neodymium Nitrate (`neodymium-nitrate`, tier 7) → [Neodymium Nitrate](https://factorio.kalzumeus.com/item/neodymium-nitrate.md)
- Paradiagmatic resistor (`paradiamatic-resistor`, tier 7) → [Paradiagmatic resistor](https://factorio.kalzumeus.com/item/paradiamatic-resistor.md)
- Polishing compound (`cerium-oxide`, tier 7) → [Polishing compound](https://factorio.kalzumeus.com/item/cerium-oxide.md)
- YAG laser module (`yag-laser-module`, tier 7) → [YAG laser module](https://factorio.kalzumeus.com/item/yag-laser-module.md)
- YBCO Monocrystal (`ybco-monocrystal`, tier 7) → [YBCO Monocrystal](https://factorio.kalzumeus.com/item/ybco-monocrystal.md)