MineArchive
Rigel XII lithium mines
Fictional record. This page describes a mine from a fictional setting, not a real place. Information is based on the cited canon, with adaptations and interpretation distinguished where necessary. It is kept separate from the real MineArchive corpus — see Fictional.
| Setting | Star Trek (Gene Roddenberry) |
|---|---|
| Location | Rigel XII, the nearly uninhabited twelfth planet of its system in the Beta Quadrant, less than two days from an asteroid belt at impulse; a miners' camp in dust and sandstorms, with Childress's own quarters eleven miles off. |
| Type | Lithium crystals |
| Worked | Established in 2263 by Memory Alpha's reckoning; the miners had been there almost three years in 2266. – Not closed within canon. |
| Extent | Three miners, a mining company camp and outlying quarters; the ore is 'high-grade' and the crystals the size of a man's fist. No workings are described. |
| Controlled by | Ben Childress (c. 2263-2266) |
Overview
The lithium mine of three lonely men on a dust-storm planet, where the Enterprise, down to its last cracked crystal, found that the price of fuel was Harry Mudd's three women.
History
In 'Mudd's Women' (1966) the Enterprise burns out its lithium crystal circuits chasing Harry Mudd's ship through an asteroid belt, and Spock recalls a lithium mining operation on Rigel XII, high-grade ore by report, less than two days away. The mine is worked by three men, Ben Childress, Gossett and Benton, who have been on the planet alone for almost three years. Mudd, under guard aboard the ship, learns as much from the crew and sees his chance: three lonely, overworked, rich miners and his three women, with lithium crystals worth, in his telling, three hundred times their weight in diamonds.
Rigel XII is dust and wind, sandstorms that can lose a man a dozen feet from his door, worse when a magnetic storm is running; water is scarce. By the time the ship reaches orbit its last crystal is gone and it has power for a few days. Childress, beamed up to bargain, refuses to sell the crystals for anything but the women and Mudd's freedom, and Kirk, with no landing party able to find a crystal the miners have hidden, gives way. Eve McHuron walks out of the miners' camp into a storm, Childress goes after her, and the two are found in his quarters eleven miles from the company camp when the storm eases. Kirk takes the crystals at the end, after Eve has chosen to stay.
The episode belongs to the first weeks of the series, when the ship's fuel was lithium; within the season it became dilithium, and the Rigel XII operation is one of the few named mines of that first idea.
Workings
Not described; a mining company camp, three miners' quarters and the crystals themselves are all the episode shows.
Closure
Not closed within canon.
What became of it
Working at the end of the episode, with Childress and Eve McHuron staying on; the planet is not revisited.
Canon & adaptations
The episode calls the mineral lithium; the series renamed it dilithium within its first season, and later canon treats dilithium as the ship's fuel. Memory Alpha classes the planet M from the Star Trek Encyclopedia and notes Star Charts' H class; the draft script also made the climate very hot.
Related fictional records
Recorded claims
Each claim is marked with its basis — explicit canon, MineArchive inference, adaptation only, or fandom interpretation — and attached to the source(s) below. Where tellings disagree, both are kept.
- Rigel XII carried a lithium mining operation producing high-grade ore, less than two days from the Enterprise at the time of 'Mudd's Women'. (explicit canon) 1,2
- The mine was worked by three men, the head miner Ben Childress with Gossett and Benton, who had been there alone for almost three years. (explicit canon) 1,2
- Harry Mudd put lithium crystals at three hundred times their weight in diamonds and thousands of times their weight in gold. (explicit canon) 1
- Dust and sandstorms were constant on Rigel XII, worse in a magnetic storm, and Childress's quarters lay eleven miles from the mining company's camp. (explicit canon) 1,2
- With the Enterprise's last crystal burnt out, Childress refused to sell until Kirk handed over Mudd's three women, and Kirk took the crystals only after the matter of Eve McHuron was settled. (explicit canon) 1
- The lithium mining operation was established in 2263 and the Enterprise's visit was in 2266; Memory Alpha also notes the planet's Class M rating against Star Charts' H class. (fandom interpretation) 2
Sources
- (primary canon) Mudd's Women — transcript (Star Trek: The Original Series, 1966) — chakoteya.net
- (interpretation) Rigel XII — Memory Alpha — Memory Alpha (Fandom)
Record created: 24 October 2026 · Last researched: 24 October 2026