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Manjiroite

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Tombstone, Tombstone District, Tombstone Hills, Cochise Co., Arizona, USA
© Thomas Witzke

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Formula:
Na(Mn
4+
7
Mn
3+
 
)O
 
16
May contain K replacing Na.
System:TetragonalColour:Brownish-grey
Lustre:DullHardness:7
Member of:Coronadite Group > Hollandite Supergroup
Name:Named in honor of Dr. Manjiro Watanabe, mineralogist, economic geologist and Emeritus Professor of Tohoku University, Japan.
This page provides mineralogical data about Manjiroite.

Classification of Manjiroite

IMA status:Approved
Strunz 8th edition ID:4/D.08-10
Nickel-Strunz 10th (pending) edition ID:4.DK.05a

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
K : With large (+- medium-sized) cations; tunnel structures
Dana 8th edition ID:7.9.1.3

7 : MULTIPLE OXIDES
9 : AB8X16
Hey's CIM Ref.:7.2.3

7 : Oxides and Hydroxides
2 : Oxides of the alkali metals
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Type Occurrence of Manjiroite

Type Locality:Kohare mine, Karumai, Iwate Prefecture, Tohoku Region, Honshu Island, Japan
Year of Discovery:1967

Physical Properties of Manjiroite

Lustre:Dull
Colour:Brownish-grey
Streak:Brownish black
Hardness (Mohs):7

Crystallography of Manjiroite

Crystal System:Tetragonal
Cell Parameters:a = 9.91Å, c = 2.86Å
Ratio:a:c = 1 : 0.289
Unit Cell Volume:V 280.88 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
7.017 (98)
4.941 (77)
3.136 (92)
2.406 (100)
2.160 (69)
1.839 (46)
1.548 (46)

Chemical Properties of Manjiroite

Formula:
Na(Mn
4+
7
Mn
3+
 
)O
 
16


May contain K replacing Na.
Essential elements:Mn, Na, O
All elements listed in formula:Mn, Na, O

Relationship of Manjiroite to other Species

Member of:Coronadite Group > Hollandite Supergroup
Other Members of Group:

- +
Coronadite
Pb(Mn
4+
6
Mn
3+
2
)O
 
16
Cryptomelane
K(Mn
4+
7
Mn
3+
 
)O
 
16
Ferrihollandite
Ba(Mn
4+
6
Fe
3+
2
)O
 
16
Hollandite
Ba(Mn
4+
6
Mn
3+
2
)O
 
16
Strontiomelane
Sr(Mn
4+
6
Mn
3+
2
)O
 
16
Related Minerals - Nickel-Strunz Grouping):

- +
4.DK.05Akaganeite
β-Fe
3+
 
O(OH,Cl)
4.DK.05aCoronadite
Pb(Mn
4+
6
Mn
3+
2
)O
 
16
4.DK.05aCryptomelane
K(Mn
4+
7
Mn
3+
 
)O
 
16
4.DK.05aHollandite
Ba(Mn
4+
6
Mn
3+
2
)O
 
16
4.DK.05bMannardite
Ba(Ti
4+
6
V
3+
2
)O
 
16
4.DK.05bPriderite
K(Ti
4+
7
Fe
3+
 
)O
 
16
4.DK.05bRedledgeite
Ba(Ti
4+
6
Cr
3+
2
)O
 
16
4.DK.05bHenrymeyerite
Ba(Ti
4+
7
Fe
2+
 
)O
 
16
4.DK.05aStrontiomelane
Sr(Mn
4+
6
Mn
3+
2
)O
 
16
4.DK.10Romanèchite
(Ba,H
 
2
O)
 
2
Mn
 
5
O
 
10
4.DK.10Todorokite
(Ca,K,Na,Mg,Ba,Mn)(Mn,Mg,Al)
 
6
O
 
12
 · 3H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
7.2.1Lithiophorite
(Al,Li)MnO
 
2
(OH)
 
2
7.2.2Diaoyudaoite
NaAl
 
11
O
 
17
7.2.4Cryptomelane
K(Mn
4+
7
Mn
3+
 
)O
 
16

Other Names for Manjiroite

Synonyms:
IMA1966-009
Other Languages:
German:Manjiroit
Japanese:万次郎鉱
Spanish:Manjiroita

Other Information

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

References for Manjiroite

Reference List:

- +
American Mineralogist (1968): 53: 2103.

Mineralogical Society of Japan (1980): 14: 72.

Internet Links for Manjiroite

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  • Manjiroite details from Handbook of Mineralogy (PDF)
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    • Localities for Manjiroite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Democratic Republic of Congo (Zaïre)
     
    • Katanga (Shaba)
      • Lulua
    		Paul De Bondt collection
    Germany
     
    • Rhineland-Palatinate
      • Lahn valley
        • Bad Ems District
          • Frücht
    		Der Aufschluss Vol.55, March/April 2004
    Japan
     
    • Honshu Island
      • Chubu Region
        • Shizuoka Prefecture
          • Kawazu
    		Powder XRD by John Attard, January 2008.
      • Tohoku Region
        • Iwate Prefecture
          • Karumai
    		Journ.Jap.Ass.Min.Petr.Econ.Geol.(1967) 58, 39-54
    Dr. Matsuo Nambu collection (curated at Geological Survey of Japan)
    Nambu & Tanida (1980) Koubutsugaku Zasshi, 14 (special volume), 62-85.
          • Kuji City
            • Yamagata
    		Nambu & Tanida (1980) Koubutsugaku Zasshi, 14 (special volume), 62-85.
          • Kunohe
    		Dr. Matsuo Nambu collection (curated at Geological Survey of Japan)
          • Ono
    		Dr. Matsuo Nambu collection (curated at Geological Survey of Japan)
    Romania
     
    • Caraş-Severin Co.
      • Banat Mts
        • Ocna de Fier-Dognecea District
    		http://minerals-of-the-carpathians.eu
    Russia
     
    • Urals Region
      • Southern Urals
        • Chelyabinsk Oblast'
          • Plast
            • Kochkar' District
              • Svetlyi
    		Igor Savin's data
    South Africa
     
    • Northern Cape Province
      • Kalahari manganese fields
    		Minerals of South Africa
    Willy Israel and Clement Smith collections
    USA
     
    • Arizona
      • Cochise Co.
        • Tombstone Hills
          • Tombstone District
            • Oregon-Prompter Mine group
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 289.
    • Colorado
      • Teller Co.
        • Cripple Creek District
    		Econ Geol (1985) 80:1669-1688
    Min Rec 36:2 pp143-185
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