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Eckermannite

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Harry von Eckermann
Formula:
NaNa2(Mg4Al}Si8O22(OH)2
The eckermannite group minerals are sodium amphiboles defined with A(Na+K+2Ca)> 0.5 apfu and 0.5 apfu < C(Al+Fe3++2Ti) < 1.5 apfu with Al as the dominant element

Eckermannite is defined with

A position: Na dominant
C2+ position: Mg dominant
C3+ position: Al dominant
W position: (OH) dominant
Lustre:
Vitreous
Hardness:
5 - 6
Specific Gravity:
3.02 (Calculated)
Crystal System:
Monoclinic
Name:
For (Claes Walter) Harry von Eckermann (5 November 1886, Stockholm, Sweden - 20 May 1969, Rönö, Sweden), industrialist, mineralogist and petrologist.
Name first introduced for an amphibole from Norra Kärr, Sweden by Adamson (1942).
Redefined IMA in 2014 (IMA2013-136), according to the new IMA-approved nomenclature of amphiboles published in 2012 (Hawthorne et al., 2012).

NOTE: In the characterization of the holotype of eckermannite from Norra Kärr (Adamson, 1942), Li was not recognized (cf. Sundius 1945). Re-examination of the holotype material and of the original sample analyzed by Törnebohm (1906) confirmed that they both are actually fluoro-leakeite (Oberti et al. 2015). A new holotype for eckermannite, from the Jade Mine Tract, Myanmar, was designated by Oberti et al. (2015).

NOTE: All localities listed here under "eckermannite" should be checked if they are to be assigned to eckermannite according to the redefinition.


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Classification of EckermanniteHide

Approved
Notes:
Renamed by the IMA
First Published:
1942
Approval History:
Renamed by IMA: 2014
9.DE.25

9 : SILICATES (Germanates)
D : Inosilicates
E : Inosilicates with 2-periodic double chains, Si4O11; Clinoamphiboles
66.1.3c.6

66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
1 : Amphiboles - Mg-Fe-Mn-Li subgroup

Pronounciation of EckermanniteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of EckermanniteHide

Vitreous
Hardness:
5 - 6 on Mohs scale
Density:
3.02 g/cm3 (Calculated)

Optical Data of EckermanniteHide

Type:
Biaxial (-)
RI values:
nα = 1.605 nβ = 1.630 nγ = 1.634
Max Birefringence:
δ = 0.029
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v moderate

Chemical Properties of EckermanniteHide

Formula:
NaNa2(Mg4Al}Si8O22(OH)2

The eckermannite group minerals are sodium amphiboles defined with A(Na+K+2Ca)> 0.5 apfu and 0.5 apfu < C(Al+Fe3++2Ti) < 1.5 apfu with Al as the dominant element

Eckermannite is defined with

A position: Na dominant
C2+ position: Mg dominant
C3+ position: Al dominant
W position: (OH) dominant
IMA Formula:
NaNa2(Mg4Al)Si8O22(OH)2

Crystallography of EckermanniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 9.8087(7) Å, b = 17.845(1) Å, c = 5.2905(4) Å
β = 103.660(1)°
Ratio:
a:b:c = 0.55 : 1 : 0.296
Unit Cell V:
899.8 ų
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.702 (100)
3.395 (59)
3.128 (56)
2.525 (56)
8.407 (42)
2.574 (36)
3.257 (34)
2.161 (33)
2.966 (33)
4.460 (30)
Comments:
From Oberti et al. (2015)

Type Occurrence of EckermanniteHide

Place of Conservation of Type Material:
In the collections of the Department of Earth and Planetary Sciences, American Museum of Natural History, New York, NY, USA, specimen number AMNH H108401
Reference:
Adamson, O.J. (1942) Eckermannite, a new alkali amphibole. Preliminary note., Geologiska Föreningens i Stockholm Förhandlingar: 64: 329-334.

Synonyms of EckermanniteHide

Other Language Names for EckermanniteHide

Relationship of Eckermannite to other SpeciesHide

Other Members of this group:
Ferro-eckermanniteNaNa2(Fe2+4Al)Si8O22(OH)2Mon.
Ferro-fluoro-eckermanniteNaNa2(Fe2+4Al}Si8O22F2
Fluoro-eckermanniteNaNa2(Mg4Al}Si8O22F2
Mangano-ferri-eckermannite[Na][Na2][Mn2+4(Fe3+)]Si8O22(OH)2Mon.
Potassic-eckermannite{K}{Na2}{Mg4Al}(Si8O22)(OH)2

Common AssociatesHide

Associated Minerals Based on Photo Data:
Arfvedsonite2 photos of Eckermannite associated with Arfvedsonite on mindat.org.
Quartz2 photos of Eckermannite associated with Quartz on mindat.org.
Aegirine1 photo of Eckermannite associated with Aegirine on mindat.org.
Richterite1 photo of Eckermannite associated with Richterite on mindat.org.
Natrolite1 photo of Eckermannite associated with Natrolite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.DE.05Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2Orth. mmm (2/m 2/m 2/m) : Pnma
9.DE.05Cummingtonite☐{Mg2}{Mg5}(Si8O22)(OH)2Mon.
9.DE.05Clino-holmquistite Root Name☐{Li2}{Z2+3Z3+2}(Si8O22)(OH,F,Cl)2Mon.
9.DE.05Grunerite☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.05Manganocummingtonite☐{Mn2+2}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.05Manganogrunerite☐{Mn2+2}{Fe2+5}(Si8O22)(OH)2Mon.
9.DE.05Permanganogrunerite☐{Mn2+2}{Mn2+5}(Si8O22)(OH)2Mon.
9.DE.05Ferro-fluoro-pedrizite{Na}{Li2}{Fe2Al2Li}(Al2Si6O22)F2Mon. 2/m : B2/m
9.DE.05Ferri-fluoro-leakeite{Na}{Na2}{Mg2Fe3+2Li}(Si8O22)F2Mon. 2/m : B2/m
9.DE.10Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.10Ferri-tschermakite☐{Ca2}{Mg3Fe3+2}(Al2Si6O22)(OH)2Mon.
9.DE.10Ferro-actinolite☐{Ca2}{Fe2+5}(Si8O22)(OH)2Mon.
9.DE.10Ferro-hornblende☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2Mon.
9.DE.10Ferro-tschermakite☐{Ca2}{Fe2+3Al2}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.10Joesmithite{Pb}{Ca2}{Mg3Fe3+2}(Be2Si6O22)(OH)2Mon.
9.DE.10Magnesio-hornblende☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2Mon.
9.DE.10Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.10Tschermakite☐(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.10CannilloiteCa(Ca2)(Mg4Al)(Al3Si5O22)(OH)2Mon.
9.DE.10Fluoro-cannilloite{Ca}{Ca2}{Mg4Al}(Al3Si5O22)(F,OH)2Mon.
9.DE.10Parvo-manganotremolite☐{CaMn2+}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.10Fluoro-tremolite☐{Ca2}{Mg5}(Si8O22)F2Mon. 2/m : B2/m
9.DE.10Potassic-fluoro-pargasite{K}{Ca2}{Mg4Al}(Al2Si6O22)F2Mon. 2/m : B2/m
9.DE.15Edenite{Na}{Ca2}{Mg5}(AlSi7O22)(OH)2Mon.
9.DE.15Ferro-edenite{Na}{Ca2}{Fe2+5}(AlSi7O22)(OH)2Mon.
9.DE.15Ferro-kaersutite{Na}{Ca2}{Fe2+3AlTi}(Al2Si6O22)O2Mon.
9.DE.15Ferro-pargasite{Na}{Ca2}{Fe2+4Al}(Al2Si6O22)(OH)2Mon.
9.DE.15Hastingsite{Na}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(OH)2Mon.
9.DE.15Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2 Mon.
9.DE.15Magnesio-hastingsite{Na}{Ca2}{Mg4Fe3+}(Al2Si6O22)(OH)2Mon.
9.DE.15Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2Mon.
9.DE.15Sadanagaite{Na}{Ca2}{Mg3Al2}(Si5Al3O22)(OH)2Mon.
9.DE.15Fluoro-edenite{Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2Mon. 2/m : P2/m
9.DE.15Potassic-ferro-ferri-sadanagaite{K}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)(OH)2Mon.
9.DE.15Potassic-sadanagaite{K}{Ca2}{Mg3Al2}(Al3Si5O22)(OH)2Mon.
9.DE.15Potassic-pargasite{K}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2Mon.
9.DE.15Potassic-ferro-sadanagaite{K}{Ca2}{Fe2+3Al2}(Al3Si5O22)(OH)2Mon.
9.DE.15Magnesio-fluoro-hastingsite{Na}{Ca2}{Mg4Fe3+}(Al2Si6O22)F2Mon. 2/m : B2/m
9.DE.15Potassic-fluoro-hastingsite{K}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(F,OH)2Mon. 2/m : B2/m
9.DE.15Potassic-chloro-hastingsite{K}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(Cl,OH)2Mon. 2/m : B2/m
9.DE.15Fluoro-pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(F,OH)2Mon. 2/m : B2/m
9.DE.15Parvo-mangano-edenite{Na}{CaMn2+}{Mg5}(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.15Potassic-chloro-pargasite{K}{Ca2}{Mg4Al}(Al2Si6O22)(Cl,OH)2
9.DE.15Potassic-ferro-chloro-edenite{K}{Ca2}{Fe2+5}(AlSi7O22)(Cl,OH)2
9.DE.15Potassic-magnesio-hastingsite{K}{Ca2}{Mg4Fe3+}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.15Potassic-ferro-pargasite{K}{Ca2}{Fe2+4Al}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.15Chromio-pargasite{Na}{Ca2}{Mg4Cr3+}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.20Ferro-taramiteNa(CaNa)(Fe2+3Al2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.20Barroisite☐{CaNa}{Mg3Al2}(AlSi7O22)(OH)2Mon.
9.DE.20Ferro-ferri-barroisite☐(CaNa)(Fe2+3Fe3+2)(AlSi7O22)(OH)2
9.DE.20Ferro-ferri-winchite☐[CaNa][Fe2+4(Fe3+,Al)]Si8O22(OH)2
9.DE.20Ferri-barroisite☐(CaNa)(Mg3Fe3+2)(AlSi7O22)(OH)2
9.DE.20Ferro-ferri-taramiteNa(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)(OH)2
9.DE.20Ferro-ferri-katophoriteNa(NaCa)(Fe2+4Fe3+)(Si7Al)O22(OH)2Mon. 2/m : B2/m
9.DE.20Ferro-barroisite☐{CaNa}{Fe2+3Al2}(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.20Ferro-richterite{Na}{CaNa}{Fe2+5}(Si8O22)(OH)2Mon.
9.DE.20Ferro-winchite ☐{CaNa}{Fe2+4Al}(Si8O22)(OH)2Mon.
9.DE.20Ferro-katophorite{Na}{CaNa}{Fe2+4Al}[(AlSi7)O22](OH)2
9.DE.20Ferri-taramiteNa(CaNa)(Mg3Fe3+2)(Al2Si6O22)(OH)2Mon.
9.DE.20Magnesiotaramite{Na}{CaNa}{Mg3AlFe3+}(Al2Si6O22)(OH)2Mon.
9.DE.20Richterite{Na}{NaCa}{Mg5}(Si8O22)(OH)2Mon.
9.DE.20Winchite☐{CaNa}{Mg4Al}(Si8O22)(OH)2Mon.
9.DE.20Taramite{Na}{CaNa}{Mg3Al2}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.20Fluoro-richterite{Na}{CaNa}{Mg5}(Si8O22)(F,OH)2Mon. 2/m
9.DE.20Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2Mon. 2/m : B2/m
9.DE.20Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2Mon.
9.DE.20Potassic-richteriteK[CaNa][Mg5]Si8O22(OH)2Mon.
9.DE.20Ferri-ghoseite☐[Mn2+Na][Mg4Fe3+]Si8O22(OH)2Mon. 2/m
9.DE.20Ferri-winchite☐[CaNa][Mg4(Fe3+,Al)]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.20Fluoro-taramite{Na}{CaNa}{Mg3Al2}(Al2Si6O22)F2Mon. 2/m : B2/m
9.DE.25Arfvedsonite[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Ferro-eckermanniteNaNa2(Fe2+4Al)Si8O22(OH)2Mon.
9.DE.25Ferro-glaucophane◻[Na2][Fe2+3Al2]Si8O22(OH)2Mon.
9.DE.25Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2Mon.
9.DE.25Potassic-mangani-leakeite[(Na,K)][Na2][Mg2Mn3+2Li]Si8O22(OH)2Mon.
9.DE.25Mangano-ferri-eckermannite[Na][Na2][Mn2+4(Fe3+)]Si8O22(OH)2Mon.
9.DE.25Ferri-leakeite[Na][Na2][Mg2Fe3+2Li]Si8O22(OH)2Mon.
9.DE.25Magnesio-riebeckite◻{Na2}{Mg3Fe3+2}(Si8O22)(OH)2Mon.
9.DE.25Magnesio-arfvedsonite{Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.25NybøiteNaNa2(Mg3Al2)(AlSi7O22)(OH)2Mon.
9.DE.25Riebeckite◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Mangano-mangani-ungarettiiteNaNa2(Mn2+2Mn3+3)(Si8O22)O2Mon.
9.DE.25Ferro-ferri-nybøiteNaNa2[(Fe2+3,Mg)Fe3+2](AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.25Clino-ferro-ferri-holmquistite◻{Li2}{Fe2+3Fe3+2}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.25Ferri-nybøiteNaNa2(Mg3Fe3+2](AlSi7O22)(OH)2Mon.
9.DE.25Ferro-ferri-leakeite[Na][Na2][Fe2+2Fe3+2Li]Si8O22(OH)2Mon.
9.DE.25Ferro-ferri-fluoro-leakeiteNa(Na2)(Fe2+2Fe3+2Li)(Si8O22)(F)2Mon.
9.DE.25Sodic-ferri-clinoferroholmquistiteNa0.5{Li2}{Fe2+3Fe3+2}(Si8O22)(OH)2Mon.
9.DE.25Magnesio-fluoro-arfvedsonite[Na][Na2][Mg4Fe3+][Si8O22](F,OH)2Mon.
9.DE.25Ferri-pedrizite[Na][Li2][Mg2Fe3+2Li]Si8O22(OH)2Mon.
9.DE.25Potassic-ferri-leakeite[K][Na2][Mg2Fe3+2Li]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Fluoro-nybøiteNaNa2(Mg3Al2)(AlSi7O22)(F,OH)2Mon. 2/m : B2/m
9.DE.25Mangani-dellaventuraite{Na}{Na2}{MgMn3+2LiTi4+}Si8O22O2Mon. 2/m : B2/m
9.DE.25Fluoro-pedriziteNaLi2(Mg2Al2Li)(Si8O22)F2Mon. 2/m : B2/m
9.DE.25Potassic-arfvedsonite[(K,Na)][Na2][Fe2+4Fe3+]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Mangani-obertiiteNa(Na2)(Mg3Mn3+Ti)(Si8O22)O2Mon. 2/m : B2/m
9.DE.25Potassic-magnesio-fluoro-arfvedsonite[(K,Na)][Na2][Mg4Fe3+][Si8O22][(F,OH)2]
9.DE.25Ferro-ferri-pedrizite[Na][Li2][Fe2+2Fe3+2Li]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Potassic-magnesio-arfvedsonite[K][Na2][Mg4Fe3+]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25PedriziteNaLi2(LiMg2Al2)(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.25Ferro-pedriziteNaLi2(Fe2+2Al2Li)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Fluoro-leakeiteNaNa2(Mg2Al2Li)(Si8O22)F2Mon. 2/m : B2/m
9.DE.25Ferro-ferri-obertiiteNaNa2(Fe2+3Fe3+Ti)Si8O22O2Mon. 2/m : B2/m

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

66.1.3c.1Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2Mon.
66.1.3c.10Mangano-ferri-eckermannite[Na][Na2][Mn2+4(Fe3+)]Si8O22(OH)2Mon.
66.1.3c.11NybøiteNaNa2(Mg3Al2)(AlSi7O22)(OH)2Mon.
66.1.3c.12Ferri-leakeite[Na][Na2][Mg2Fe3+2Li]Si8O22(OH)2Mon.
66.1.3c.13Potassic-mangani-leakeite[(Na,K)][Na2][Mg2Mn3+2Li]Si8O22(OH)2Mon.
66.1.3c.14Mangano-mangani-ungarettiiteNaNa2(Mn2+2Mn3+3)(Si8O22)O2Mon.
66.1.3c.15Ferro-ferri-fluoro-leakeiteNa(Na2)(Fe2+2Fe3+2Li)(Si8O22)(F)2Mon.

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 EckermanniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Adamson, O.J. (1942) Eckermannite, a new alkali amphibole. Preliminary note., Geologiska Föreningens i Stockholm Förhandlingar: 64: 329-334.
Sundius, N. (1946) The composition of Eckermannite and its position in the amphibole group. Sveriges Geologiska Undersökning: Serie C 475.
Leake, B.E. (1978) Nomenclature of amphiboles. American Mineralogist: 63: 1023-1052. http://rruff.info/rruff_1.0/uploads/AM63_1023.pdf
Leake, B.E., Woolley, A.R., Arps, C.E.S., Birch, W.D., Gilbert, M.C., Grice, J.D., Hawthorne, F.C., Kato, A., Kisch, H.J., Krivovichev, V.G., Linthout, K., Laird, J., Mandarino, J.A., Maresch, W.V., Nickel, E.H., Rock, N.M.S., Schumacher, J.C., Smith, D.C., Stephenson, N.C.N., Ungaretti, L., Whittaker, E.J.W., Youzhi, G. (1997) Nomenclature of amphiboles: report of the Subcommittee on Amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names. The Canadian Mineralogist: 35: 219-246. http://rruff.info/rruff_1.0/uploads/CM35_219.pdf
Leake, B.E., Woolley, A.R., Birch, W.D., Burke, E.A.J., Ferraris, G., Grice, J.D., Hawthorne, F.C., Kisch, H.J., Krivovichev, V.G., Schumacher, J.C., Stephenson, N.C.N., Whittaker, E.J.W. (2003) Nomenclature of amphiboles: additions and revisions to the International Mineralogical Association’s 1997 recommendations. The Canadian Mineralogist: 41: 1355-1362. http://rruff.info/rruff_1.0/uploads/CM41_1355.pdf
Hawthorne, F.C., Oberti, R. (2006) On the classification of amphiboles. The Canadian Mineralogist: 44: 1-21.
Hawthorne, F.C., Oberti, R., Harlow, G.E., Maresch, W.V., Martin, R.F., Schumacher, J.C., Welch, M.D. (2012) Nomenclature of the amphibole supergroup. American Mineralogist: 97: 2031-2048.
Oberti, R., Boiocchi, M., Hawthorne, F.C., Ball, N.A., Harlow, G.E.(2014) Eckermannite, IMA 2013-136. CNMNC Newsletter No. 20, June 2014, page 553; Mineralogical Magazine: 78: 549-558
Williams, P.A., Hatert, F., Pasero, M., Mills, S.J. (2014) IMA Commission on new minerals, nomenclature and classification (CNMNC) Newsletter 20. New minerals and nomenclature modifications approved in 2014. Mineralogical Magazine: 78: 549-558. http://rruff.info/rruff_1.0/uploads/MM78_549.pdf
Oberti, R., Boiocchi, M., Hawthorne, F.C., Ball, N.A., Harlow, G.E. (2015) Eckermannite revised: The new holotype from the Jade Mine Tract, Myanmar—crystal structure, mineral data, and hints on the reasons for the rarity of eckermannite. American Mineralogist: 100: 909-914.
Danisi, R.M., Armbruster, T. (2017) Crystal structure of potassic-mangani-leakeite from the Wessels Mine, Kalahari Manganese Field, South Africa. European Journal of Mineralogy: 29: 143-148.

Internet Links for EckermanniteHide

Localities for EckermanniteHide

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.
Brazil
 
  • Minas Gerais
    • Araxá
Berger, V.I., Singer, D.A., and Orris, G.J., 2009, Carbonatites of the world, explored deposits of Nb and REE; database and grade and tonnage models: U.S. Geological Survey Open-File Report 2009-1139, 17 p. and database.
    • Ubá
no Reference added
China
 
  • Liaoning Province (Manchuria; Dongbei Region)
    • Dandong Prefecture
      • Fengcheng Co.
        • Saima complex
Yiming Zhao and Daxin Li (2003): Mineral Deposits 22(4), 345-359
Finland
 
  • Lapland Region
    • Savukoski
      • Tulppio
Vartiainen, H. 1980 The petrography, mineralogy and petrochemistry of the Sokli carbonative massif, northern Finland. Geological Survey of Finland, Bulletin, 313
Greenland
 
  • Qeqqata
    • Kangerlussuaq Fjord (Søndre Strømfjord)
      • Kangerlussuaq complex
MinRec 16:485-494
India
 
  • Madhya Pradesh
    • Jhabua District
Nayak, V. K. and Leake, B. E. (1975). On 'winchite' from the original locality at Kajlidongri, India, Mineralogical Magazine, 40,395-399.
Italy
 
  • Aosta Valley
    • Nus
      • Saint-Barthélemy
• Barresi, A.A., Kolitsch, U., Ciriotti, M.E., Ambrino, P., Bracco, R., Bonacina, E. (2005): La miniera di manganese di Varenche (Aosta, Italia nord-occidentale): ardennite, arseniopleite, manganberzeliite, pirofanite, sarkinite, thortveitite, nuovo As-Sc-analogo della metavariscite e altre specie. Micro (località), 2/2005, 81-122.
  • Piedmont
    • Verbano-Cusio-Ossola Province
      • Ossola Valley
        • Mergozzo
          • Candoglia
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
Japan
 
  • Honshu Island
    • Chubu Region
      • Niigata Prefecture
wwwsoc.nii.ac.jp/jampeg/93-11.htm.
Fossa Magna Museum specimen, Itoigawa
    • Tohoku Region
      • Iwate Prefecture
        • Shimohei-gun
          • Tanohata-mura
Dr. Matsuo Nambu collection (curated at Geological Survey of Japan)
Madagascar
 
  • Antananarivo Province
    • Bongolava Region
      • Tsiroanomandidy District
Mukosi, Ndivhuwo Cecilia (2012): Petrogenesis of the Ambohiby Complex, Madagascar and the role of the Marion Hotspot Plume. Thesis (MSc)-Stellenbosch University, 2012
  • Antsiranana Province
    • Diana Region (Northern Region)
      • Ambanja District
        • Ampasindava Peninsula
Rakotovao, S. (2009): Les minéralisations associées aux intrusions alcalines d’Ampasindava.- http://madarevues.recherches.gov.mg/revues/pdfxfiles/Madageo13(1).pdf RAKOTOVAO, S.R. (2009): LES MINERALISATIONS ASSOCIEES AUX INTRUSIONS ALCALINES D’AMPASINDAVA.- Ph.D. study, University of Antananarivo, 189 pages.
Myanmar (TL)
 
  • Kachin State
    • Mohnyin District (Moe Hnyin District)
      • Hpakant Township (Hpakan; Phakant; Phakan)
Shi, G. H., Zhu, X. K., Deng, J., Mao, Q., Liu, Y. X., & Li, G. W. (2011). Geochimica et Cosmochimica Acta, 75(6), 1608-1620; Guanghai Shi, George E. Harlow, Jing Wang, Jun Wang, Enoch Ng, Xia Wang, ShuMin Cao and Wenyuan CUI(2012): Mineralogy of jadeitite and related rocks from Myanmar: a review with new data. European Journal of mineralogy, Vol 24, pp 345-384; Oberti, R., Boiocchi, M., Hawthorne, F.C., Ball, N.A. and Harlow, G.E.(2014) Eckermannite, IMA 2013-136. CNMNC Newsletter No. 20, June 2014, page 553; Mineralogical Magazine, 78, 549-558; Oberti, R., Boiocchi, M., Hawthorne, F.C., Ball, N.A., Harlow, G.E. (2015): Eckermannite revised: The new holotype from the Jade Mine Tract, Myanmar—crystal structure, mineral data, and hints on the reasons for the rarity of eckermannite. American Mineralogist, 100, 909-914.
Shi, G., Harlow, G. E., Wang, J., Wang, J., Ng, E., Wang, X., ... & Cui, W. (2012). Mineralogy of jadeitite and related rocks from Myanmar: a review with new data. European Journal of Mineralogy, 24(2), 345-370.
Nyunt, T. T. (2009). Petrological and geochemical contribution to the origin of jadeitite and associated rocks of the Tawmaw Area, Kachin State, Myanmar.
Norway
 
  • Sogn og Fjordane
    • Askvoll
Furnes, H., Mitchell, J.G., Robins, B., Ryan, P., Skjerlie, F. J. (1982): Petrography and geochemistry of peralkaline, ultrapotassic syenite dykes of Middle Permian age, Sunnfjord, West Norway. Norsk Geologisk Tidsskrift, 62, 147-159.
Romania
 
  • Suceava Co.
    • Suceava district
      • Iacobeni (Jakobeny; Jacobeny; Jakabfalva)
http://minerals-of-the-carpathians.eu
Russia
 
  • Eastern-Siberian Region
    • Sakha Republic (Saha Republic; Yakutia)
[World of Stones 12:49]
        • Aldan
          • Inagli Massif
http://geo.web.ru/druza/l-Inagli.htm
  • Northern Region
    • Murmanskaya Oblast'
Arzamastseva, L.V., Pakhomovsky, Ya.A. [Арзамасцева, Л.В., Пахомовский Я.А.] (1999): Mineral associations in rocks of Niva agpaitic intrusion (Kola Peninsula) as indicators of its forming conditions [Минеральные ассоциации пород агпаитовой интрузии Нива (Кольский Полуостров) как индикаторы условий ее образования]. Zap. VMO [Зап. ВМО], 128, 6, 1-16 (in Russian); Arzamastsev, A.A., Belyatsky, B.V., Arzamastseva, L.V. (2000): Agpaitic magmatism in the northeastern Baltic Shield: a study of the Niva intrusion, Kola Peninsula, Russia. Lithos, 51, 1, 27-46.
Spain
 
  • Canary Islands
    • Las Palmas Province
      • Gran Canaria (Grand Canary)
        • Arucas
Hernandez-Pacheco, A., (1969): The Tahitites of Gran Canaria and their haüynitization, Bulletin volcanologique, Vol. 33, 701-728
Sweden
 
  • Småland
    • Jönköping
      • Gränna
Adamson, O.J. (1942): Eckermannite, a new alkali amphibole. Geologiska Föreningen i Stockholm Förhandlingar, 64 :329-334; Amer. Mineral., 29, 455; Sundius, N. : The composition of Eckermannite and its position in the amphibole group. Sveriges Geologiska Undersökning. Serie C 475; Oberti, R., Boiocchi, M., Hawthorne, F.C., Ball, N.A., Harlow, G.E. (2015): Eckermannite revised: The new holotype from the Jade Mine Tract, Myanmar—crystal structure, mineral data, and hints on the reasons for the rarity of eckermannite. American Mineralogist, 100, 909-914.
Adamson, O.J. (1942): Eckermannite, a new alkali amphibole. Geologiska Föreningen i Stockholm Förhandlingar, 64 :329-334; Amer. Mineral., 29, 455; Sundius, N. : The composition of Eckermannite and its position in the amphibole group. Sveriges Geologiska Undersökning. Serie C 475; Oberti, R., Boiocchi, M., Hawthorne, F.C., Ball, N.A., Harlow, G.E. (2015): Eckermannite revised: The new holotype from the Jade Mine Tract, Myanmar—crystal structure, mineral data, and hints on the reasons for the rarity of eckermannite. American Mineralogist, 100, 909-914.
  • Västmanland
    • Hällefors
      • Grythyttan
Victoria Museum Specimen, Melbourne
USA
 
  • Alaska
    • Yukon-Koyukuk Borough
      • Iditarod District
U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
  • California
    • Humboldt Co.
      • Coastal Range
www.mineralogicalassociation.ca/doc/abstracts/cm5_Vol36_Oct98.pdf.
  • Colorado
    • Boulder Co.
      • Lake Albion
Minerals of Colorado (1997) Eckels, E. B.
    • Jackson Co.
      • Pearl District
Minerals of Colorado (1997) Eckels, E. B.
  • New Hampshire
    • Carroll Co.
      • Conway
        • North Conway
Rocks and Minerals, (1990) 65:286-296
Mineral and/or Locality  
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