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Colorless, yellowish to reddish brown.
5 - 6
Specific Gravity:
Crystal System:
Member of:
Named after Edwin Woods Roedder (July 30, 1919–August 1, 2006), geologist and leader in the field of fluid and melt inclusions.
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Classification of RoedderiteHide


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

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

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

Physical Properties of RoedderiteHide

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

Optical Data of RoedderiteHide

Uniaxial (+)
RI values:
nω = 1.537 - 1.543 nε = 1.536 - 1.547
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:

Chemical Properties of RoedderiteHide

IMA Formula:
Common Impurities:

Crystallography of RoedderiteHide

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

Type Occurrence of RoedderiteHide

Synonyms of RoedderiteHide

Other Language Names for RoedderiteHide

Simplified Chinese:罗镁大隅石

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
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
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-(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
Trattnerite□(Fe3+,Mg,Fe2+)2(Mg,Fe2+,Fe3+)3(Si12O30)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
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
Ferrosilite3 photos of Roedderite associated with Ferrosilite on
Tridymite1 photo of Roedderite associated with Tridymite on

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.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.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.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.8PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
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

14.24.2Magnesio-arfvedsonite{Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2Mon. 2/m : B2/m
14.24.3CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2Mon. 2/m : B2/m
14.24.6ChayesiteK(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.
  • 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).
  • 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)
  • Anhui Province
    • Bozhou Prefecture
      • Qiaocheng District
        • Xiaoyanzhuang / 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)
  • 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.
  • 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
  • Szabolcs-Szatmár-Bereg Co.
    • Tarpa
Szakáll-Gatter-Szendrei: Mineral Species of Hungary, 2006
  • Uttar Pradesh
    • Basti Division
      • Basti District
        • Gorakhpur
Lunar and Planetary Science XXXII (2001)
  • 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; ; Forrest Cureton specimens.
Kanehara, Hiroshi Shigeno, Koji Ono, Kimio Okumura, Keiji (1976), Roedderite of altered volcanic rocks of Satsuma Iwo Jima; ; Forrest Cureton specimens.
Amir Akhavan field observations
  • 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)
  • 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).
  • Castile-La Mancha
    • Albacete
      • Hellín
        • Cancarix
E. Salvioli-mariani et al. , Eur. J. Mineral. , 1996, 8, pp. 1027-1039.
  • Kassala Wilayah
    • Gash delta
  • 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.
  • 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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