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Hydroxymanganopyrochlore

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Formula:
(Mn2+,Th,Na,Ca,REE)2(Nb,Ti)2O6(OH)
System:
Isometric
Colour:
Dark-brown; black
Name:
Named according to the nomenclature of the Pyrochlore supergroup with Mn on the A-position and the hydroxyl ion (OH-) on the Y-position.
Mn2+ dominant analog of hydroxycalciopyrochlore.

Classification of Hydroxymanganopyrochlore

Approved 2012
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First Recorded Occurrence of Hydroxymanganopyrochlore

General Appearance of First Recorded Material:
Octahedral crystals up to 0.7mm in diameter growing on the walls in small miarolitic cavities in sanidinite.
Place of Conservation of First Recorded Material:
Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4226/1

Occurrences of Hydroxymanganopyrochlore

Geological Setting:
Laach Lake volcanic Complex.

Physical Properties of Hydroxymanganopyrochlore

Colour:
Dark-brown; black
Comment:
Black with red reflexes
Tenacity:
Brittle
Cleavage:
None Observed
Density:
5.398 g/cm3 (Calculated)

Crystallography of Hydroxymanganopyrochlore

Crystal System:
Isometric
Class (H-M):
m3 (2/m 3) - Diploidal
Cell Parameters:
a = 10.2523(2) Å
Unit Cell Volume:
V 1,077.62 ų (Calculated from Unit Cell)
Morphology:
Octahedral crystals.
Comment:
Space group Fd3m
X-Ray Powder Diffraction Data:
d-spacingIntensity
2.969 (100)
2.569 (40)
2.358 (12)
1.816 (47)
1.548 (40)
1.481 (14)
1.284 (10)
1.178 (14)

Chemical Properties of Hydroxymanganopyrochlore

Formula:
(Mn2+,Th,Na,Ca,REE)2(Nb,Ti)2O6(OH)
Essential elements:
All elements listed in formula:
Analytical Data:
Na2O(2.48)
CaO(3.65)
MnO(8.22)
Fe2O3(3.39)
La2O3(3.22)
Ce2O3(6.67)
Nd2O3(0.67)
TiO2(15.43)
ThO2(22.58)
UO2(2.42)
Nb2O5(29.42)
F(0.49)
H2O(1.34) calc
-O=F2 (-0.21)
Total 100.11

Relationship of Hydroxymanganopyrochlore to other Species

Other Members of Group:
Fluorcalciopyrochlore(Ca,Na)2(Nb, Ti)2O6F
Fluorkenopyrochlore(□,Sr,Ce,Ca,Na)2(Nb,Ti)2O6F
Fluornatropyrochlore(Na,REE,Ca)2Nb2(O,OH)6F
Fluorplumbopyrochlore(Pb,Y,Th,U,Na,Ca)2-x(Nb,Ti)2O6F
Fluorstrontiopyrochlore(Sr,□)2Nb2(O,OH)6F
Hydropyrochlore(H2O,□)2Nb2(O,OH)6(H2O)
Hydroxycalciopyrochlore(Ca,Na,U,□)2(Nb,Ti)2O6(OH)
Hydroxyplumbopyrochlore(Pb,Ca)2-x(Nb,Ti,Ta)2O6(OH)
Kenoplumbopyrochlore(Pb,□)Nb2O6(□,O)
OxycalciopyrochloreCa2Nb2O6O
Oxynatropyrochlore(Na,Ca,U)2Nb2O6(O,OH)
OxyplumbopyrochlorePb2Nb2O6O
Oxyyttropyrochlore-(Y)(Y,◻)2Nb2O6O

Other Names for Hydroxymanganopyrochlore

Name in Other Languages:

Other Information

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 Hydroxymanganopyrochlore

Reference List:
Chukanov, N.V., Blass, G., Zubkova, N.V., Pekov, I.V., Pushcharovsky, D.Y. and Prinz, H. (2012) Hydroxymanganopyrochlore, IMA 2012-005. CNMNC Newsletter No. 13, June 2012, page 813; Mineralogical Magazine, 76, 807-817.

Blaß, G. & Kruijen, F. (2012): Die neuen Mineralfunde aus der Vulkaneifel. Mineralien-Welt 23 (5), 38-48 (in German).

Chukanov, N. V., Blaß, G., Zubkova, N. V.,Pekov, I. V., Pushcharovskii, D. Yu. & H. Prinz (2013): Hydroxymanganopyrochlore: A new mineral from the Eifel volcanic region, Germany. Doklady Akademii Nauk, 449 (2), 215-218.[In Russian]

Chukanov, N. V., Blaß, G., Zubkova, N. V.,Pekov, I. V., Pushcharovskii, D. Yu. & H. Prinz (2013): Hydroxymanganopyrochlore: A new mineral from the Eifel volcanic region, Germany. Doklady Earth Sciences, 449 (1), 342-345 [In english]

Internet Links for Hydroxymanganopyrochlore

Localities for Hydroxymanganopyrochlore

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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
    • Eifel
      • Laach lake volcanic complex
        • Mendig
          • Niedermendig
Chukanov, N.V., Blass, G., Zubkova, N.V., Pekov, I.V., Pushcharovsky, D.Y. and Prinz, H. (2012) Hydroxymanganopyrochlore, IMA 2012-005. CNMNC Newsletter No. 13, June 2012, page 813; Mineralogical Magazine, 76, 807-817; Blaß, G. & Kruijen, F. (2012): Die neuen Mineralfunde aus der Vulkaneifel. Mineralien-Welt 23 (5), 38-48 (in German).
Mineral and/or Locality  
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