@misc{indiciaeb0b80d699f3a,
  title = {Pentaborate polyanion in the crystal structure of ulexite, NaCaB 5 O 6 (OH) 6 *5H 2 O},
  author = {Joan R. Clark and Daniel E. Appleman},
  year = {1964},
  doi = {10.1126/science.145.3638.1295},
  url = {https://pubs.usgs.gov/publication/70010745},
  note = {Source identifier: 70010745}
}