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Jimboite

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About JimboiteHide

Kotora Jimbo
Formula:
(Mn2+,Mg)3[BO3]2
Hardness:
Crystal System:
Orthorhombic
Name:
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

Approved
Approval Year:
1963
6.AA.35

6 : BORATES
A : Monoborates
A : BO3, without additional anions; 1(D).
24.3.2.2

24 : ANHYDROUS BORATES
3 : AmBn[XO3]p
9.7.3

9 : Borates
7 : Borates of Mn

Physical Properties of JimboiteHide

Hardness:
5½ on Mohs scale

Optical Data of JimboiteHide

Type:
Biaxial (+)
RI values:
nα = 1.792 nβ = 1.794 nγ = 1.821
2V:
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
Dispersion:
r > v perceptible

Chemical Properties of JimboiteHide

Formula:
(Mn2+,Mg)3[BO3]2
IMA Formula:
Mn2+3(BO3)2
Common Impurities:
Mg

Crystallography of JimboiteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 5.66 Å, b = 8.71 Å, c = 4.65 Å
Ratio:
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

German:Jimboit
Japanese:神保石
Spanish:Jimboita

Common AssociatesHide

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

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
6.AA.40TakedaiteCa3[BO3]2Trig.

Related Minerals - Dana Grouping (8th Ed.)Hide

24.3.2.1KotoiteMg3[BO3]2Orth. mmm (2/m 2/m 2/m) : Pnnm

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.7.1Pinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Mon.
9.7.2Orthopinakiolite(Mg,Mn2+)2Mn3+(BO3)O2Orth.
9.7.4SussexiteMn2+BO2(OH)Orth. 2 2 2 : P21 21 2
9.7.5Wiserite(Mn,Mg)14[Cl|(OH)8|(Si,Mg)(O,OH)4|(B2O5)4]Tet.
9.7.6KurchatoviteCa(Mg,Mn2+)[B2O5]Orth.
9.7.7ClinokurchatoviteCa(Mg,Fe2+,Mn2+)[B2O5]Mon.
9.7.8Takéuchiite(Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2Orth.
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.
Japan
 
  • Honshu Island
    • Chubu Region
      • Fukui Prefecture
        • Mikata-kaminaka-gun
          • 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.
    • Kanto Region
      • Gunma Prefecture
        • 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 Prefecture
        • 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.
Mineral and/or Locality  
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