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Roedderite

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Formula:
(Na,K)2(Mg,Fe)5Si12O30
Colour:
Colorless, yellowish to reddish brown.
Lustre:
Vitreous
Hardness:
5 - 6
Specific Gravity:
2.6
Crystal System:
Hexagonal
Member of:
Name:
Named after Edwin Woods Roedder (July 30, 1919–August 1, 2006), geologist and leader in the field of fluid and melt inclusions.
Hide all sections | Show all sections

Classification of RoedderiteHide

Approved
9.CM.05

9 : SILICATES (Germanates)
C : Cyclosilicates
M : [Si6O18]12- 6-membered double rings (sechser-Doppelringe)
63.2.1a.14

63 : CYCLOSILICATES Condensed Rings
2 : Condensed Rings (Milarite - Osumilite group)
14.24.4

14 : Silicates not Containing Aluminum
24 : Silicates of Fe, Mg and alkalis

Physical Properties of RoedderiteHide

Vitreous
Transparency:
Transparent, Translucent
Colour:
Colorless, yellowish to reddish brown.
Hardness:
5 - 6 on Mohs scale
Density:
2.6 g/cm3 (Measured)    2.63 g/cm3 (Calculated)

Optical Data of RoedderiteHide

Type:
Uniaxial (+)
RI values:
nω = 1.537 - 1.543 nε = 1.536 - 1.547
2V:
Measured: 2° to 5°
Max Birefringence:
δ = 0.001
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low

Chemical Properties of RoedderiteHide

Formula:
(Na,K)2(Mg,Fe)5Si12O30
IMA Formula:
KNaMg2(Mg3Si12)O30
Common Impurities:
Ti,Al,Mn

Crystallography of RoedderiteHide

Crystal System:
Hexagonal
Class (H-M):
6 m2 - Ditrigonal Dipyramidal
Space Group:
P62c
Cell Parameters:
a = 10.139(3) Å, c = 14.269(4) Å
Ratio:
a:c = 1 : 1.407
Unit Cell V:
1,270.32 ų (Calculated from Unit Cell)
Z:
2

Type Occurrence of RoedderiteHide

Synonyms of RoedderiteHide

Other Language Names for RoedderiteHide

German:Roedderit
Japanese:レダー石
Simplified Chinese:罗镁大隅石
Spanish:Roedderita

Relationship of Roedderite to other SpeciesHide

Member of:
Other Members of this group:
Agakhanovite-(Y)(YCa)□2KBe3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
AlmaruditeK(□,Na)2(Mn2+,Fe2+,Mg)2(Be,Al)3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
ArmeniteBaCa2Al6Si9O30 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnna
BerezanskiteK□2Li3(Ti,Zr,Sn)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Brannockite(K,Na)□2Li3(Sn,Zr,Ti)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
DarapiositeK(Na,◻,K)2(Li,Zn,Fe)3(Mn,Zr,Y)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
DusmatoviteK(Na,□)2(Zn,Li)3(Mn2+,Y,Zr)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
EifeliteKNa3Mg4Si12O30Hex.
FriedrichbeckeiteK(□0.5Na0.5)2Mg2Be3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Klöchite(□Na)KFe2+2Zn3(Si12O30)Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
Merrihueite(K,Na)2(Fe,Mg)5Si12O30Hex.
MilariteK2Ca4Al2Be4Si24O60 · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc
OftedaliteK(Sc,Ca,Mn2+)22[(Be,Al)3Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Osumilite(K,Na)(Fe2+,Mg)2(Al,Fe3+)3(Si,Al)12O30Hex.
Osumilite-(Mg)KMg2Al3(Al2Si10)O30 Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
ShibkoviteK(□,K,Na)2Zn3Ca2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
SogdianiteK(□,Na)2Li3(Zr,Fe,Ti)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
SugiliteK(Na,□)2Li3(Fe,Mn,Al,Zr)2[Si12O30]Hex.
Trattnerite□(Fe3+,Mg,Fe2+)2(Mg,Fe2+,Fe3+)3(Si12O30)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
UM1990-73-SiO:KMnNaZn(K,Na)2Zn3Mn1.5Si12O30Hex.
Yagiite(Na,K)3Mg4(Al,Mg)6(Si,Al)24O60Hex. 6/mmm (6/m 2/m 2/m)
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
Hematite3 photos of Roedderite associated with Hematite on mindat.org.
Ferrosilite3 photos of Roedderite associated with Ferrosilite on mindat.org.
Tridymite1 photo of Roedderite associated with Tridymite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.CM.05ArmeniteBaCa2Al6Si9O30 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnna
9.CM.05Brannockite(K,Na)□2Li3(Sn,Zr,Ti)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ChayesiteK(Mg,Fe)4FeSi12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05DarapiositeK(Na,◻,K)2(Li,Zn,Fe)3(Mn,Zr,Y)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05EifeliteKNa3Mg4Si12O30Hex.
9.CM.05Merrihueite(K,Na)2(Fe,Mg)5Si12O30Hex.
9.CM.05MilariteK2Ca4Al2Be4Si24O60 · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05Osumilite-(Mg)KMg2Al3(Al2Si10)O30 Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05Osumilite(K,Na)(Fe2+,Mg)2(Al,Fe3+)3(Si,Al)12O30Hex.
9.CM.05PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05SogdianiteK(□,Na)2Li3(Zr,Fe,Ti)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05SugiliteK(Na,□)2Li3(Fe,Mn,Al,Zr)2[Si12O30]Hex.
9.CM.05Yagiite(Na,K)3Mg4(Al,Mg)6(Si,Al)24O60Hex. 6/mmm (6/m 2/m 2/m)
9.CM.05BerezanskiteK□2Li3(Ti,Zr,Sn)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05DusmatoviteK(Na,□)2(Zn,Li)3(Mn2+,Y,Zr)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ShibkoviteK(□,K,Na)2Zn3Ca2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05AlmaruditeK(□,Na)2(Mn2+,Fe2+,Mg)2(Be,Al)3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
9.CM.05Trattnerite□(Fe3+,Mg,Fe2+)2(Mg,Fe2+,Fe3+)3(Si12O30)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05OftedaliteK(Sc,Ca,Mn2+)22[(Be,Al)3Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.10FaizieviteK2Na(Ca6Na)Ti4Li6[F2|Si24O66]Tric. 1 : P1

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

63.2.1a.1Brannockite(K,Na)□2Li3(Sn,Zr,Ti)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.2ChayesiteK(Mg,Fe)4FeSi12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.3DarapiositeK(Na,◻,K)2(Li,Zn,Fe)3(Mn,Zr,Y)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.4EifeliteKNa3Mg4Si12O30Hex.
63.2.1a.5Merrihueite(K,Na)2(Fe,Mg)5Si12O30Hex.
63.2.1a.6Osumilite(K,Na)(Fe2+,Mg)2(Al,Fe3+)3(Si,Al)12O30Hex.
63.2.1a.8PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.9SugiliteK(Na,□)2Li3(Fe,Mn,Al,Zr)2[Si12O30]Hex.
63.2.1a.10Yagiite(Na,K)3Mg4(Al,Mg)6(Si,Al)24O60Hex. 6/mmm (6/m 2/m 2/m)
63.2.1a.11DusmatoviteK(Na,□)2(Zn,Li)3(Mn2+,Y,Zr)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.12MilariteK2Ca4Al2Be4Si24O60 · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.13SogdianiteK(□,Na)2Li3(Zr,Fe,Ti)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.24.1Magnesio-riebeckite◻{Na2}{Mg3Fe3+2}(Si8O22)(OH)2Mon.
14.24.2Magnesio-arfvedsonite{Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2Mon. 2/m : B2/m
14.24.3CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2Mon. 2/m : B2/m
14.24.5Merrihueite(K,Na)2(Fe,Mg)5Si12O30Hex.
14.24.6ChayesiteK(Mg,Fe)4FeSi12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc

Other InformationHide

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 RoedderiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Fuchs, L.H., Frondel, C., Klein, C. Jr. (1966) Roedderite, a new mineral from the Indarch meteorite. American Mineralogist: 51: 949-955.
Hentschel, G., Abraham, K., Schreyer. W. (1980) First terrestrial occurrence of roedderite in volcanic ejecta of the Eifel, Germany. Contributions to Mineralogy and Petrology: 73: 127-130.
Armbruster, T. (1989) Crystal chemistry of double-ring silicates: structure of Roedderite at 100 and 300 K. European Journal of Mineralogy: 1: 715-718.
Alietii, E., Brigatti, M.F., Capedri, S., Poppi, L. (1994) The roedderite-chayesite series from Spanish lamproites: Crystal-Chemical Characterization. Mineralogical Magazine: 58: 655-662.

Internet Links for RoedderiteHide

Localities for RoedderiteHide

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.
Antarctica
 
  • Eastern Antarctica
    • Queen Maud Land (Dronning Maud Land)
      • Queen Fabiola Mts (Yamato Mts)
Brearley, A. J. & Jones, R. H. (1998): Chondritic Meteorites. In: Planetary Materials (Papike, J. J., Editor): Chapter 3, 398 pages. Mineralogical Society of America: Washington, DC, USA. (1998)
    • Victoria Land
      • Allan Hills
Krot, A.N. & Wasson, J.T. (1994) Silica-merrihueite/roedderite-bearing chondrules and clasts in ordinary chondrites: New occurrences and possible origin: Meteoritics 29(5): 707-718. (Sept 1994).
Austria
 
  • Styria
    • Bad Radkersburg
      • Klöch
Lapis 2003(1), 7-8
Azerbaijan (TL)
 
  • Ağcabədi District (Aghjabadi)
    • Shusha
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; American Mineralogist, Volume 93, pages 902–909, 2008; Brearley, A. J. & Jones, R. H. (1998): Chondritic Meteorites. In: Planetary Materials (Papike, J. J., Editor): Chapter 3, 398 pages. Mineralogical Society of America: Washington, DC, USA. (1998)
China
 
  • Anhui Province
    • Bozhou Prefecture
      • Qiaocheng District
        • Xiaoyanzhuang
http://www.lpi.usra.edu/meetings/LPSC99/pdf/1774.pdf / Lunar and Planetary Science XXX, J. C. Bridges et al.
  • Guizhou Province
    • Guiyang Prefecture
      • Qingzhen Co.
Hsu, W. (1998). Geochemical and petrographic studies of oldhamite, diopside, and roedderite in enstatite meteorites: Meteoritics & Planetary Science 33 (2): 291-301. (March 1998).; Rambaldi, E. R., Rajan, R. S. & Housley, R. M. (1986) Roedderite in the Qingzhen (EH3) chondrite: Meteoritics 21(1): 141-149. (March 1986)
France
 
  • Auvergne-Rhône-Alpes
    • Haute-Loire
      • Le Puy-en-Velay
        • Espaly-Saint-Marcel
Barrier D, Pourtier G, Médard P (2004) Minéralogie du mont Denise (Haute-Loire). Le Cahier des Micromonteurs 83: 3-11.
      • Solignac-sur-Loire
        • Le Brignon
P & E Médard collection
    • Puy-de-Dôme
      • Rochefort-Montagne
        • Perpezat
Valverde, J. (2009): Prospection dans la carrière du puy de Vivanson, Perpezat, Puy-de-Dôme. Le Cahier des Micromonteurs, 106, 30-31.
Germany
 
  • Rhineland-Palatinate
    • Eifel
      • Andernach
        • Nickenich
Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag München, 1983
Hand Egon Künzel, Günter Blaß, Willi Schüller (2011) Mineralien - Bomben - Grottensteine: Der Nickenicher Weinberg. Lapis, 36, #7-8, 55-66
      • Daun
        • Oberstadtfeld
Leu, K., Der Vulkanabbau "Auf´m Kopp" bei Oberstadtfeld in der Westeifel, Lapis 2/1995
        • Üdersdorf
Künzel, E., Roedderit vom Emmelberg / Eifel, Lapis 3/1986
      • Kelberg
        • Drees
Schüller, W., Die Mineralien des Niveligsberges bei Drees in der Eifel, Der Aufschluß SB 33, 1990
      • Mayen
        • Ettringen
          • Bellerberg volcano
[Hentschel, G., Abraham, K., Schreyer, W. , Roedderit und Osumilith aus dem Laacher Vulkangebiet, Fortschr. Mineral. 55, Beih. 1, 43-44, 1977] [Lapis 2003(1), 7]
      • Polch
        • Ochtendung
Lapis 1988(7+8), 70-72
Hungary
 
  • Szabolcs-Szatmár-Bereg Co.
    • Tarpa
Szakáll-Gatter-Szendrei: Mineral Species of Hungary, 2006
India
 
  • Uttar Pradesh
    • Basti Division
      • Basti District
        • Gorakhpur
Lunar and Planetary Science XXXII (2001)
Japan
 
  • Kyushu Region
    • Nansei Archipelago
      • Kagoshima Prefecture
        • Mishima village
Kanehara, Hiroshi Shigeno, Koji Ono, Kimio Okumura, Keiji (1976), Roedderite of altered volcanic rocks of Satsuma Iwo Jima; www5b.biglobe.ne.jp/~mineral/roedderite2.htm. ; Forrest Cureton specimens.
Kanehara, Hiroshi Shigeno, Koji Ono, Kimio Okumura, Keiji (1976), Roedderite of altered volcanic rocks of Satsuma Iwo Jima; www5b.biglobe.ne.jp/~mineral/roedderite2.htm. ; Forrest Cureton specimens.
Amir Akhavan field observations
Malawi
 
  • Nkhotakota District
Brearley, A. J. & Jones, R. H. (1998): Chondritic Meteorites. In: Planetary Materials (Papike, J. J., Editor): Chapter 3, 398 pages. Mineralogical Society of America: Washington, DC, USA. (1998)
Romania
 
  • Mureş Co.
Krot, A.N. & Wasson, J.T. (1994) Silica-merrihueite/roedderite-bearing chondrules and clasts in ordinary chondrites: New occurrences and possible origin: Meteoritics 29(5):707–718. (Sept 1994).
Spain
 
  • Castile-La Mancha
    • Albacete
      • Hellín
        • Cancarix
E. Salvioli-mariani et al. , Eur. J. Mineral. , 1996, 8, pp. 1027-1039.
Sudan
 
  • Kassala Wilayah
    • Gash delta
www.meteoritestudies.com/protected_MAYO-BEL.HTM
USA
 
  • Arizona
    • Coconino Co.
      • Winslow
        • Meteor Crater and vicinity
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 171-172, 356; Olsen, E. & L. Fuchs (1968), Krinovite, NaMg2CrSi3O10 = a new meteorite mineral, Science 161: 786-787
  • Texas
    • Wichita Co.
http://rruff.geo.arizona.edu/doclib/hom/roedderite.pdf.
Yemen
 
  • Hadramawt Governorate
LPSC 26,659(1995); Zolensky, M. & A.Ivanov, Chemie der Erde 63,185-246(2003)
Outer Space
 
Ishii, H. A., Bradley, J. P., Dai, Z. R., Chi, M., Kearsley, A. T., Burchell, M. J., ... & Molster, F. (2008). Comparison of comet 81P/Wild 2 dust with interplanetary dust from comets. Science, 319(5862), 447-450.
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