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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,K)Mn
 
8
O
 
16
 · nH
 
2
O
System:TetragonalColour:Brownish-grey
Lustre:DullHardness:7
Member of:Cryptomelane Group
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.05

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,K)Mn
 
8
O
 
16
 · nH
 
2
O
Essential elements:H, Mn, Na, O
All elements listed in formula:H, K, Mn, Na, O

Relationship of Manjiroite to other Species

Member of:Cryptomelane Group
Other Members of Group:

- +
Coronadite
Pb(Mn
4+
 
,Mn
3+
 
)
 
8
O
 
16
Cryptomelane
K(Mn
4+
 
,Mn
2+
 
)
 
8
O
 
16
Hollandite
Ba(Mn
4+
 
,Mn
2+
 
)
 
8
O
 
16
Strontiomelane
SrMn
4+
6
Mn
3+
2
O
 
16
Related Minerals - Nickel-Strunz Grouping):

- +
4.DK.05Akaganeite
β-Fe
3+
 
O(OH,Cl)
4.DK.05Ankangite
Ba(Ti,V
3+
 
,Cr)
 
8
O
 
16
4.DK.05Coronadite
Pb(Mn
4+
 
,Mn
3+
 
)
 
8
O
 
16
4.DK.05Hollandite
Ba(Mn
4+
 
,Mn
2+
 
)
 
8
O
 
16
4.DK.05Mannardite
Ba
 
x
Ti
 
8-2x
V
 
2x
O
 
16
·2-xH
 
2
O
4.DK.05Priderite
(K,Ba)(Ti,Fe)
 
8
O
 
16
4.DK.05Redledgeite
Ba
 
x
([Cr,Fe,V]
3+
2x
Ti
 
8-2x
)O
 
16
4.DK.05Henrymeyerite
BaFe
2+
 
Ti
 
7
O
 
16
4.DK.10Cryptomelane
K(Mn
4+
 
,Mn
2+
 
)
 
8
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
4.DK.10Strontiomelane
SrMn
4+
6
Mn
3+
2
O
 
16
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+
 
,Mn
2+
 
)
 
8
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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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • 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.
    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
     
    • Caras-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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