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Retzian-(Ce)

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Anders Jahan Retzius
Formula:
Mn2+2Ce(AsO4)(OH)4
Colour:
Chocolate brown to chestnut-brown; brown in transmitted light.
Lustre:
Vitreous, Greasy
Hardness:
4
Specific Gravity:
4.15
Crystal System:
Orthorhombic
Name:
First described by Sjögren (1894) as a new mineral from Mossgruvan (Moss Mine), Nordmark, Värmland, Sweden. Later, Moore (1968) presented crystallographic data. Re-examination of the type material by Duun & Sturman (1982) showed this to be Ce-rich, and they redefined and renamed retzian as retzian-(Ce), in accordance with Levinson's rules. Named after Anders Jahon Retzius (1742-1821), Swedish naturalist and Professor of Botany plus the -(Ce) suffix due to the dominance of Ce in the composition.
Retzian Group. The Ce analogue of Retzian-(La) and Retzian-(Nd).


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Classification of Retzian-(Ce)Hide

Approved
8.BM.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
M : With medium-sized and large cations, (OH, etc.):RO4 = 4:1
41.3.4.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
3 : (AB)3(XO4)Zq
20.4.16

20 : Arsenates (also arsenates with phosphate, but without other anions)
4 : Arsenates of Group III metals (Al, rare earths)

Physical Properties of Retzian-(Ce)Hide

Vitreous, Greasy
Transparency:
Translucent
Colour:
Chocolate brown to chestnut-brown; brown in transmitted light.
Streak:
Light brown
Hardness:
Fracture:
Irregular/Uneven, Conchoidal
Density:
4.15 g/cm3 (Measured)    4.45 g/cm3 (Calculated)

Optical Data of Retzian-(Ce)Hide

Type:
Biaxial (+)
RI values:
nα = 1.777 nβ = 1.788 nγ = 1.800
Max Birefringence:
δ = 0.023
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v slight
Pleochroism:
Visible
Comments:
X = c = Nearly colourless to orange-yellow
Y = b = Yellowish brown to dark brown
Z = a = Red-brown to crimson red.

Chemical Properties of Retzian-(Ce)Hide

Formula:
Mn2+2Ce(AsO4)(OH)4
IMA Formula:
Mn2+2CeAsO4(OH)4

Crystallography of Retzian-(Ce)Hide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pban
Setting:
Pban
Cell Parameters:
a = 5.670(3) Å, b = 12.03(1) Å, c = 4.863(4) Å
Ratio:
a:b:c = 0.471 : 1 : 0.404
Unit Cell V:
331.71 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals prismatic [001], sometimes also tabular {010}.
Twinning:
On {150}, doubtful.

Type Occurrence of Retzian-(Ce)Hide

Place of Conservation of Type Material:
Smithsonian
Geological Setting of Type Material:
Cavities in dolomite
Associated Minerals at Type Locality:

Synonyms of Retzian-(Ce)Hide

Other Language Names for Retzian-(Ce)Hide

Relationship of Retzian-(Ce) to other SpeciesHide

Structurally related to group(s):
Retzian GroupMn2+2REE(AsO4)(OH)4

Common AssociatesHide

Associated Minerals Based on Photo Data:
Jacobsite1 photo of Retzian-(Ce) associated with Jacobsite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.BM.05Retzian-(La)(Mn2+,Mg)2(La,Ce,Nd)(AsO4)(OH)4Orth. mmm (2/m 2/m 2/m) : Pban
8.BM.05Retzian-(Nd)Mn2+2(Nd,Ce,La)(AsO4)(OH)4Orth. mmm (2/m 2/m 2/m) : Pban
8.BM.10Paulkellerite(BiO)2Fe3+(PO4)(OH)2Mon. 2/m : B2/b
8.BM.10KolitschitePbZn0.5Fe3(AsO4)2(OH)6Mon. 2/m : B2/b
8.BM.15Brendelite(Bi3+,Pb)2(Fe3+,Fe2+)(PO4)O2(OH)Mon. 2/m : B2/m

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

41.3.4.2Retzian-(Nd)Mn2+2(Nd,Ce,La)(AsO4)(OH)4Orth. mmm (2/m 2/m 2/m) : Pban
41.3.4.3Retzian-(La)(Mn2+,Mg)2(La,Ce,Nd)(AsO4)(OH)4Orth. mmm (2/m 2/m 2/m) : Pban

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.4.1MansfielditeAlAsO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
20.4.2BulachiteAl2(AsO4)(OH)3 · 3H2OOrth.
20.4.3PharmacoalumiteKAl4(AsO4)3(OH)4 · 6.5H2OIso. 4 3m : P4 3m
20.4.4LuetheiteCu2Al2(AsO4)2(OH)4Mon. 2/m : P21/m
20.4.5ArsenogoyaziteSrAl3(AsO4)(AsO3OH)(OH)6Trig. 3m (3 2/m) : R3m
20.4.6ArsenocrandalliteCaAl3(AsO4)(AsO3OH)(OH)6Trig. 3m (3 2/m)
20.4.7Arsenoflorencite-(Ce)CeAl3(AsO4)2(OH)6Trig. 3m (3 2/m) : R3m
20.4.8Arsenoflorencite-(La)LaAl3(AsO4)2(OH)6Trig. 3m (3 2/m) : R3m
20.4.9Arsenoflorencite-(Nd)NdAl3(AsO4)2(OH)6Trig.
20.4.10Gerdtremmelite(Zn,Fe)(Al,Fe)2(AsO4)(OH)5Tric.
20.4.11Gasparite-(Ce)Ce(AsO4)
20.4.12Chernovite-(Y)Y(AsO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
20.4.13Agardite-(Y)YCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
20.4.14Agardite-(La)LaCu6(AsO4)3(OH)6 · 3H2OHex. 6/m
20.4.15GoudeyiteAlCu6(AsO4)3(OH)6 · 3H2OHex.
20.4.17Retzian-(La)(Mn2+,Mg)2(La,Ce,Nd)(AsO4)(OH)4Orth. mmm (2/m 2/m 2/m) : Pban
20.4.18Retzian-(Nd)Mn2+2(Nd,Ce,La)(AsO4)(OH)4Orth. mmm (2/m 2/m 2/m) : Pban

Other InformationHide

Notes:
Soluble in acids.
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 Retzian-(Ce)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Sjögren (1894) Bulletin of the Geological Institute Upsala: 2: 54 (as Retzian).
Sjögren (1897) Geologiska Föeningens I Stockholm. Förhandlinger, Stockholm: 19 (as Retzian).
Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 126.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 794-795 (as Retzian).
American Mineralogist (1967): 52: 1603-1613.
Moore, P.B. (1968) Contributions to Swedish mineralogy. I. Studies on the basic arsenates of manganese: retzian, hemafibrite, synadelphite, arsenoclasite, arseniopleite, and akrochordite. Arkiv. Mineral. Geol., 4(5), 425–444.
Dunn, P. J., Sturman, B. D. (1982) Retzian-(Nd), a new mineral from Sterling Hill, New Jersey and a redefinition of retzian. American Mineralogist: 67: 841-845.

Internet Links for Retzian-(Ce)Hide

Localities for Retzian-(Ce)Hide

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.
South Africa
 
  • North West Province
    • Bojanala Platinum District
      • Western Bushveld Complex
The Canadian Mineralogist, V 42, 2004, pp. 1169-1178.; R. Liferovich - L. Horváth p.c. (2004)
Sweden
 
  • Värmland
    • Filipstad
      • Nordmark Odal Field (Nordmarksberg)
Mineralogical Magazine(1978) 42, 133-136
Bull. Geol. Inst. Univ. Upsala (1895): 2, 54-59; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 795.
Mineral and/or Locality  
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