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About JimboiteHide

Kotora Jimbo
Crystal System:
Named by T. Watanabe, A. Kato, T. Matsumoto, and J. Ito in 1963 in honor of Prof. Kotora Jimbo (1867 - 1924), the founder of the Mineralogical Institute, University of Tokyo.
This page provides mineralogical data about Jimboite.

Classification of JimboiteHide

Approval Year:

A : Monoborates
A : BO3, without additional anions; 1(D).

3 : AmBn[XO3]p

9 : Borates
7 : Borates of Mn

Physical Properties of JimboiteHide

5½ on Mohs scale

Optical Data of JimboiteHide

Biaxial (+)
RI values:
nα = 1.792 nβ = 1.794 nγ = 1.821
Measured: 30° , Calculated: 32°
Max Birefringence:
δ = 0.029
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
r > v perceptible

Chemical Properties of JimboiteHide

IMA Formula:
Common Impurities:

Crystallography of JimboiteHide

Crystal System:
Cell Parameters:
a = 5.66 Å, b = 8.71 Å, c = 4.65 Å
a:b:c = 0.65 : 1 : 0.534
Unit Cell V:
229.24 ų (Calculated from Unit Cell)

Type Occurrence of JimboiteHide

Synonyms of JimboiteHide

Other Language Names for JimboiteHide


Common AssociatesHide

Associated Minerals Based on Photo Data:
Rhodochrosite2 photos of Jimboite associated with Rhodochrosite on

Related Minerals - Nickel-Strunz GroupingHide

6.AA.05SassoliteH3BO3Tric. 1 : P1
6.AA.15NordenskiöldineCaSn4+[BO3]2Trig. 3 : R3
6.AA.15TusioniteMn2+Sn4+[BO3]2Trig. 3 : R3
6.AA.35KotoiteMg3[BO3]2Orth. mmm (2/m 2/m 2/m) : Pnnm

Related Minerals - Dana Grouping (8th Ed.)Hide[BO3]2Orth. mmm (2/m 2/m 2/m) : Pnnm

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.7.4SussexiteMn2+BO2(OH)Orth. 2 2 2 : P21 21 2
9.7.5Wiserite(Mn2+,Mg)14(B2O5)4(OH)8 · (Si,Mg)(O,OH)4ClTet.
9.7.9BlatteriteSb5+(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32Orth. mmm (2/m 2/m 2/m) : Pnnm
9.7.10TusioniteMn2+Sn4+[BO3]2Trig. 3 : R3

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for JimboiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Watanabe, T., Kato, A., Matsumoto, T., Ito, J. (1963) Jimboite, Mn3(BO3)2, a new mineral from the Kaso mine, Tochigi Prefecture, Japan. Proceedings of the Japan Academy: 39: 170-175.
Fleischer, M. (1963) New mineral names. American Mineralogist: 48: 1413-1421.
Bondareva, O.S., Simonov, M.A., Belov, N.V. (1978) The crystal structure of synthetic jimboite, Mn3(BO3)2. Soviet Physics - Crystallography: 23: 272-273.
Grew, E.S., Anovitz, L.M. (1996) Boron: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for JimboiteHide

Localities for JimboiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Fukui
    • Mikata-kaminaka District
      • Wakasa-cho
National Science Museum (Tokyo) specimen; 加藤昭, & 松原聰. (1980). 本邦産マンガン硼酸塩鉱物. 鉱物学雜誌, 14(Special3), 86-97.
  • Gunma
    • Midori City
      • Seta
Excalibur Mineral Co. and Kotaro Watanabe specimens; 加藤昭, & 松原聰. (1980). 本邦産マンガン硼酸塩鉱物. 鉱物学雜誌, 14(Special3), 86-97.
  • Tochigi
    • Kanuma City
Watanabe et al (1963) Proceedings of the Japan Academy, series B, 39, 170-175.; Akira Kato (undated manuscript): Country rock and Minerals of the Kaso mine, Kanuma City, Tochigi Prefecture. (in japanese); 加藤昭, & 松原聰. (1980). 本邦産マンガン硼酸塩鉱物. 鉱物学雜誌, 14(Special3), 86-97.
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