Sb-rich pinakiolite

Where it forms, where it's found

1recorded occurrences

Source · OpenStreetMap

Physical

Colour: Light olive-green to yellowish brown · bronze-like

Crystallography

Crystal system: Monoclinic
Space group: C2/m
Cell parameters: a = 21.773(4) Å · b = 6.153(2) Å · c = 5.327(2) Å
Cell angles: β = 94.38(2) °
Ratio a:b:c: 1 : 0.283 : 0.245
Z: 8
Morphology: Tabular, micaous habit.

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 5 15.999 79.995
38.07%
25MnManganese Manganese 0.91 54.938 49.994
23.79%
12MgMagnesium Magnesium 1.9 24.305 46.179
21.98%
51SbAntimony Antimony 0.19 121.760 23.134
11.01%
5BBoron Boron 1 10.810 10.810
5.15%
Total 210.112 100.00%
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
8OOxygen	Oxygen	5	15.999	79.995	38.07%
25MnManganese	Manganese	0.91	54.938	49.994	23.79%
12MgMagnesium	Magnesium	1.9	24.305	46.179	21.98%
51SbAntimony	Antimony	0.19	121.760	23.134	11.01%
5BBoron	Boron	1	10.810	10.810	5.15%
	Total	210.112	100.00%

Literature, links & citation

Citations

1988Hansen, S., Hålenius, Ulf, Lindqvist, B. (1988) Antimony-rich pinakiolite from Långban, Sweden: a new structural variety. Neues Jahrbuch für Mineralogie - Monatshefte, 1988. 231-238
1990Norrestam, Rolf, Hansen, Staffan (1990) Structural investigation of an antimony-rich pinakiolite, Mg1.90Mn0.91Sb0.19O2BO3, from Långban, Sweden. Zeitschrift für Kristallographie - Crystalline Materials, 191 (1) 105-116 doi:10.1524/zkri.1990.191.1-2.105DOI: 10.1524/zkri.1990.191.1-2.105

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Sb-rich pinakiolite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/sb-rich-pinakiolite-47995},
  note      = {Accessed 2026-05-11}
}