Makotoite

Where it forms, where it's found

Type locality: Funan Au deposit (Bunan)
Zhaoyuan City
Yantai
Shandong
China
37.4036°, 120.2711°

1recorded occurrences

Source · OpenStreetMap

Crystallography

Crystal system: Trigonal
Space group: R-3c
Cell parameters: a = 13.584(2) Å · c = 16.781(3) Å

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
47AgSilver Silver 12 107.868 1294.416
66.77%
16SSulfur Sulfur 8 32.060 256.480
13.23%
79AuGold Gold 1 196.967 196.967
10.16%
29CuCopper Copper 3 63.546 190.638
9.84%
Total 1938.501 100.00%
Mass share = atoms × atomic mass ÷ molar mass × 100
From IMA formula

Mass composition breakdown
Element	Atoms	At. mass g/mol	Mass g/mol	Mass share
47AgSilver	Silver	12	107.868	1294.416	66.77%
16SSulfur	Sulfur	8	32.060	256.480	13.23%
79AuGold	Gold	1	196.967	196.967	10.16%
29CuCopper	Copper	3	63.546	190.638	9.84%
	Total	1938.501	100.00%

Synonyms

IMA2020-071
Makotoiet

In other languages

German: IMA 2020-071 · Makotoit

Classification

Strunz

10th ed.

2.BA

2Sulfides and SulfosaltsClass
2.BMetal Sulfides, M: S > 1: 1 (mainly 2: 1)Division
2.BAWith Cu, Ag, AuGroup
2.BAMakotoiteSpecies

Literature, links & citation

Citations

2021Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2021) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 59. European Journal of Mineralogy, 33 (1) 139-143 doi:10.5194/ejm-33-139-2021 DOI: 10.5194/ejm-33-139-2021
2022(2022) Makotoite. Handbook of Mineralogy. Mineralogical Society of America

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Makotoite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/makotoite-55316},
  note      = {Accessed 2026-05-11}
}