Guastoniite-(Y)

Where it forms, where it's found

Type locality: Dara-i-Pioz Massif
Districts of Republican Subordination
Tajikistan
39.4504°, 70.7163°

1recorded occurrences

Source · OpenStreetMap

Safety & handling

Crystallography

Crystal system: Triclinic
Space group: #2
Cell parameters: a = 11.114(2) Å · b = 10.818(2) Å · c = 11.133(2) Å
Cell angles: α = 90.43(3) ° · β = 90.03(3) ° · γ = 90.01(3) °
Ratio a:b:c: 1 : 0.973 : 1.002

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
82PbLead Lead 4 207.200 828.800
48.96%
8OOxygen Oxygen 28 15.999 447.972
26.47%
14SiSilicon Silicon 8 28.085 224.680
13.27%
39YYttrium Yttrium 1 88.906 88.906
5.25%
5BBoron Boron 4 10.810 43.240
2.56%
20CaCalcium Calcium 1 40.078 40.078
2.37%
9FFluorine Fluorine 1 18.998 18.998
1.12%
Total 1692.674 100.00%
Mass share = atoms × atomic mass ÷ molar mass × 100
From Mindat formula

Mass composition breakdown
Element	Atoms	At. mass g/mol	Mass g/mol	Mass share
82PbLead	Lead	4	207.200	828.800	48.96%
8OOxygen	Oxygen	28	15.999	447.972	26.47%
14SiSilicon	Silicon	8	28.085	224.680	13.27%
39YYttrium	Yttrium	1	88.906	88.906	5.25%
5BBoron	Boron	4	10.810	43.240	2.56%
20CaCalcium	Calcium	1	40.078	40.078	2.37%
9FFluorine	Fluorine	1	18.998	18.998	1.12%
	Total	1692.674	100.00%

Synonyms

Guastoniiet-(Y)
IMA2024-082

In other languages

German: Guastoniit-(Y) · IMA 2024-082

Classification

Strunz

10th ed.

9.CH.05

9SilicatesClass
9.CCyclosilicatesDivision
9.CH[Si₄O₁₂]₈- 4-membered double ringsGroup
9.CH.05Guastoniite-(Y)Species

Group, growth & confusion

4 members

Literature, links & citation

Citations

— Agakhanov, A.A., Nestola, F., Sokolova, E., Škoda, R., Pautov, L.A., Karpenko, V.Y., Hawthorne, F.C., Pekov, I.V., Kasatkin, A.V., Аgakhanova, V.A., Britvin, S.N. and Molinari, S. (2025) Guastoniite-(Y), IMA 2024-082. CNMNC Newsletter 84, Mineralogical Magazine, 89, https://10.1180/mgm.2025.22

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Guastoniite-(Y) — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/guastoniite-y-471959},
  note      = {Accessed 2026-05-11}
}