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Marokite

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Formula:
CaMn
 
2
O
 
4
System:Orthorhombic
Name:
For the first occurrence in Morocco, Maroc in French.
This page provides mineralogical data about Marokite.

Classification of Marokite

IMA status:Approved
Strunz 8th edition ID:4/B.05-60
Nickel-Strunz 10th (pending) edition ID:4.BC.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
C : With medium-sized and large cations
Dana 8th edition ID:7.2.10.1

7 : MULTIPLE OXIDES
2 : AB2X4
Hey's CIM Ref.:7.4.15

7 : Oxides and Hydroxides
4 : Oxides of Be, Mg and the alkaline earths
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Type Occurrence of Marokite

Type Locality:Tachgagalt Mine, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco
Year of Discovery:1963

Crystallography of Marokite

Crystal System:Orthorhombic
Cell Parameters:a = 9.71Å, b = 10.03Å, c = 3.16Å
Ratio:a:b:c = 0.968 : 1 : 0.315
Unit Cell Volume:V 307.76 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
2.71 (vs)
2.22 (vs)
2.29 (s)
2.07 (s)
2.87 (m)
2.56 (m)
1.63 (m)

Chemical Properties of Marokite

Formula:
CaMn
 
2
O
 
4
Simplified for copy/paste:CaMn2O4
Essential elements:Ca, Mn, O
All elements listed in formula:Ca, Mn, O

Relationship of Marokite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.BC.10Dmitryivanovite
CaAl
 
2
O
 
4
Related Minerals - Hey's Index Grouping:

- +
7.4.1Bromellite
BeO
7.4.2Behoite
Be(OH)
 
2
7.4.3Clinobehoite
Be(OH)
 
2
7.4.4Chrysoberyl
BeAl
 
2
O
 
4
7.4.5Magnesiotaaffeite-2N’2S
Mg
 
3
Al
 
8
BeO
 
16
7.4.6Magnesiotaaffeite-6N’3S
Mg
 
2
BeAl
 
6
O
 
12
7.4.7Periclase
MgO
7.4.8Brucite
Mg(OH)
 
2
7.4.9Spinel
MgAl
 
2
O
 
4
7.4.10Meixnerite
Mg
 
6
Al
 
2
(OH)
 
16
(OH)
 
2
· 4H
 
2
O
7.4.11Lime
CaO
7.4.12Portlandite
Ca(OH)
 
2
7.4.13Chlormayenite
Ca
 
12
Al
 
14
O
 
32
Cl
 
2
7.4.14Hydrocalumite
Ca
 
4
Al
 
2
(OH)
 
12
(Cl,CO
 
3
,OH)
 
2
· 4H
 
2
O
7.4.16Ranciéite
(Ca,Mn)Mn
 
4
O
 
9
· 3H
 
2
O
7.4.17Hollandite
Ba(Mn
4+
6
Mn
3+
2
)O
 
16
7.4.18Romanèchite
(Ba,H
 
2
O)
 
2
Mn
 
5
O
 
10
7.4.19Todorokite
(Ca,K,Na,Mg,Ba,Mn)(Mn,Mg,Al)
 
6
O
 
12
· 3H
 
2
O

Other Names for Marokite

Synonyms:
IMA1963-005
Other Languages:
German:Marokit
Russian:Марокит
Spanish:Marokita

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 Marokite

Reference List:

- +
Gaudefroy, C., Jouravsky, G. and Permingeat, F. (1963): La marokite, CaMn2O4 une nouvelle éspèce minérale. Bulletin de la Société française de Minéralogie et de Cristallographie: 86, 359-67. (in French).

Couffon, M. M., Rocher, G. and Protas, J. (1964): Determination de la structure de la marokite. Compt. Rend. 258, 1847-1849. (in French).

American Mineralogist (1964): 49: 817.

American Mineralogist (1968): 53: 495.

Internet Links for Marokite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Marokite details from Handbook of Mineralogy (PDF)
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  • Localities for Marokite

    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.
    (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.
    Morocco
     
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
    Bull.Soc.fr.Min.Crist.(1963) 86, 359-367
    South Africa
     
    • Northern Cape Province
      • Kalahari manganese field
        • Black Rock
    Am Min 53:495
        • Hotazel
    Von Bezing, K. L. et al. (1991) The Kalahari manganese field: An Update, Mineralogical Record 22(4) 279-302;; Beukes, N. J., Burger, A. M., & Gutzmer, J. (1995). Fault-controlled hydrothermal alteration of Palaeoproterozoic manganese ore in Wessels Mine, Kalahari manganese field. South African Journal of Geology, 98(4), 430-451.
        • Kuruman
          • N'Chwaning Mines
    Minerals of South Africa
    USA
     
    • Nevada
      • Mineral Co.
        • Candelaria District
    NBMG Spec. Pub. 31 Minerals of Nevada
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