johachidolite
noun · first attested 1942
The original 1942 chemical formula was wrong, and it took thirty-five years to fix.
A calcium aluminum borate, CaAl(B3O7), with an unusually dense atomic structure.
North Hamgyong Province·North Korea
41.9030°N 129.4080°E · Q109361
Record
- Relationship
- Named from the place
- Confidence
- Well attestedThe place link is the standard scholarly account.
- Attested
- 1942
- Part of speech
- noun
Explanations here are written for this atlas. Dictionary text is not copied; the sources are linked so the claim can be checked.
- Step 1
North Hamgyong Province
- In English
johachidolite
E. Iwase and N. Saito described johachidolite in 1942 from nepheline veins cutting limestone at Johachido in what is now North Hamgyong Province, North Korea, calling it a hydrous fluoborate of sodium, calcium and aluminum. Moore and Araki reported its dense structure in Nature in 1972, and Aristarain and Erd redefined it in 1977 as an anhydrous calcium aluminum borate. Gem-quality crystals later turned up at Mogok in Myanmar.