Johnjamborite

Where it forms, where it's found

Type locality: Madoc Township
Hastings County
Ontario
Canada

Safety & handling

Crystallography

Crystal system: Triclinic
Space group: #2
Cell parameters: a = 31.7535(1) Å · b = 8.39262(3) Å · c = 50.2412(2) Å
Cell angles: α = 90.0281(3) ° · β = 102.2277(3) ° · γ = 89.7075(3) °
Ratio a:b:c: 1 : 0.264 : 1.582

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
82PbLead Lead 14 207.200 2900.800
50.75%
16SSulfur Sulfur 38 32.060 1218.280
21.31%
51SbAntimony Antimony 8.5 121.760 1034.960
18.11%
33AsArsenic Arsenic 7.5 74.922 561.915
9.83%
Total 5715.955 100.00%
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	14	207.200	2900.800	50.75%
16SSulfur	Sulfur	38	32.060	1218.280	21.31%
51SbAntimony	Antimony	8.5	121.760	1034.960	18.11%
33AsArsenic	Arsenic	7.5	74.922	561.915	9.83%
	Total	5715.955	100.00%

Synonyms

IMA2024-077
Johnjamboriet

In other languages

German: IMA 2024-077 · Johnjamborit

Classification

Strunz

10th ed.

2.HC.05c

2Sulfides and SulfosaltsClass
2.HSulfosalts of SnS archetypeDivision
2.HCWith only PbGroup
2.HC.05cJohnjamboriteSpecies

Literature, links & citation

Citations

2025Bosi, Ferdinando; Hatert, Frédéric; Pasero, Marco; Mills, Stuart J. (2025) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 84. European Journal of Mineralogy, 37 (2). 249-255 doi:10.5194/ejm-37-249-2025 DOI: 10.5194/ejm-37-249-2025

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Johnjamborite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/johnjamborite-471941},
  note      = {Accessed 2026-05-11}
}