Mineraldle
Puzzle #88 was aldermanite.
Aldermanite is a rare hydrated phosphate mineral with formula Mg5Al12(PO4)8(OH)22·32H2O. It is named after Arthur Richard Alderman (1901–1980), Professor of Geology and Mineralogy, University of Adelaide. Its type locality is Moculta Phosphate Quarry (Klemm's Quarry), Angaston, Barossa Valley, North Mount Lofty Ranges, Mount Lofty Ranges, South Australia, Australia.
What the record says
Puzzle 88 ran on 11 Oct 2026 and the answer was aldermanite, played with 6 guesses against 4 columns. On the record: Crystal system - orthorhombic; Strunz group - phosphates-related; Elements - Al, H, Mg, O, P; Named after - person.
Beyond the grid the record adds Formula - Mg₅Al₁₂(PO₄)₈(OH)₂₂·32H₂O; Named after - Arthur Richard Alderman.
Mineraldle builds its record from Wikidata - CC0 1.0. The description above comes from the same place the game credits on every reveal: English Wikipedia verbatim extract, CC BY-SA 4.0. The puzzle itself is still playable in the archive, and every answer that has been and gone is listed on the past-answers page.
How it scored
- Crystal system
- orthorhombic
- Strunz group
- phosphates-related
- Elements
- Al, H, Mg, O, P
- Named after
- person
Also on the record
- Formula
- Mg₅Al₁₂(PO₄)₈(OH)₂₂·32H₂O
- Named after
- Arthur Richard Alderman