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Aluminosugilite

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About AluminosugiliteHide

Formula:
KNa2Al2Li3Si12O30
Colour:
Pinkish-purple
Lustre:
Vitreous
Hardness:
6 - 6½
Specific Gravity:
2.71 - 2.72
Crystal System:
Hexagonal
Member of:
Name:
Named for being the aluminum analogue of sugilite. There is a technical discussion in Nagashima et al. (2020) on why the modifier was made a prefix rather than a suffix.
This page provides mineralogical data about Aluminosugilite.


Classification of AluminosugiliteHide

Approved
Approval Year:
2019
First Published:
2020
9.CM.9.CM.

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

Physical Properties of AluminosugiliteHide

Vitreous
Colour:
Pinkish-purple
Streak:
Pale purple to white
Hardness:
6 - 6½ on Mohs scale
Cleavage:
Poor/Indistinct
On (0001)
Density:
2.71 - 2.72 g/cm3 (Measured)    2.73 g/cm3 (Calculated)

Optical Data of AluminosugiliteHide

Type:
Uniaxial (-)
RI values:
nω = 1.577 - 1.586 nε = 1.575 - 1.585
Max Birefringence:
δ = 0.002
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Weak

Chemical Properties of AluminosugiliteHide

Formula:
KNa2Al2Li3Si12O30

Chemical AnalysisHide

Oxide wt%:
 12
SiO271.9 %72.9 %
TiO20.1 % %
Al2O36.0 %7.6 %
Mn2O34.5 %1.6 %
Fe2O32.1 %0.9 %
MnO0.3 %1.7 %
MgO0.1 %0.2 %
Na2O6.0 %6.3 %
K2O4.7 %4.7 %
Li2O4.4 %4.3 %
Total:100.1 %100.2 %
Sample references:
IDLocalityReference
1N'Chwaning III Mine, N'Chwaning Mines, Kuruman, Kalahari manganese field, Northern Cape, South AfricaFrank K. Mazdab collection (thin section FKM-173; representative composition)
2  "  "Frank K. Mazdab collection (thin section FKM-173; most Al-rich portion of mineral)

Crystallography of AluminosugiliteHide

Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P6/mcc
Setting:
P6/mcc
Cell Parameters:
a = 9.9830(4) Å, c = 13.9667(5) Å
Ratio:
a:c = 1 : 1.399
Unit Cell V:
1205.45 ų
Comment:
Cell parameters for single crystal X-ray. Powder gave slightly smaller dimensions.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.32Å(100)
4.06Å(38)
3.67Å(14)
3.48Å(30)
3.18Å(92)
2.86Å(70)
2.71Å(18)
2.49Å(18)
Comments:
From Type Description.

Type Occurrence of AluminosugiliteHide

General Appearance of Type Material:
Aggregates of small prismatic and/or granular crystals up to 1 mm in length
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the National Museum of Nature and Science, Tsukuba, Japan, specimen numbers NSMMF- 16503
Geological Setting of Type Material:
Manganiferous metacherts
Associated Minerals at Type Locality:
Reference:
Nagashima, M., Fukuda, C., Matsumoto, T., Imaoka, T., Odicino, G. , and Armellino, G. (2020) Aluminosugilite, KNa2Al2Li3Si12O30, an Al analogue of sugilite, from the Cerchiara mine, Liguria, Italy. European Journal of Mineralogy: 32: 57-66.

Synonyms of AluminosugiliteHide

Relationship of Aluminosugilite 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(Mn,Fe,Mg)2[(Be,Al)3Si12]O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
ArmeniteBaCa2Al6Si9O30 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnna
BerezanskiteKTi2Li3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
BrannockiteKSn2(Li3Si12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
ChayesiteK(Mg,Fe2+)4Fe3+[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
DarapiositeKNa2Mn2(Li2ZnSi12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
DusmatoviteKK2Mn2(Zn2LiSi12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
EifeliteKNa3Mg4Si12O30Hex.
FriedrichbeckeiteK(◻Na)Mg2(Be2Mg)Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Klöchite(Fe2+Fe3+)◻2KZn3(Si12O30)Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
Merrihueite(K,Na)2(Fe2+,Mg)5Si12O30Hex.
MilariteK2Ca4Al2Be4Si24O60 · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc
OftedaliteKSc22Be3Si12O30Hex. 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)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
RoedderiteKNaMg2(Mg3Si12)O30Hex. 6 m2 : P62c
ShibkoviteK2Ca2(Zn3Si12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
SogdianiteKZr2Li3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
SugiliteKNa2Fe3+2(Li3Si12)O30Hex.
TrattneriteFe3+2(Mg3Si12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
UM1990-73-SiO:KMnNaZn(K,Na)2Zn3Mn1.5Si12O30Hex.
Unnamed (Mn3+-dominant analog of Sugilite)KNa2(Mn3+,Fe3+,Al)2Li3Si12O30
YagiiteNaMg2(AlMg2Si12)O30Hex. 6/mmm (6/m 2/m 2/m)

Related Minerals - Nickel-Strunz GroupingHide

9.CM.Agakhanovite-(Y)(YCa)□2KBe3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ArmeniteBaCa2Al6Si9O30 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnna
9.CM.05BrannockiteKSn2(Li3Si12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ChayesiteK(Mg,Fe2+)4Fe3+[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05DarapiositeKNa2Mn2(Li2ZnSi12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05EifeliteKNa3Mg4Si12O30Hex.
9.CM.05Merrihueite(K,Na)2(Fe2+,Mg)5Si12O30Hex.
9.CM.05MilariteK2Ca4Al2Be4Si24O60 · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05Osumilite-(Mg)KMg2Al3(Al2Si10)O30Hex. 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.05RoedderiteKNaMg2(Mg3Si12)O30Hex. 6 m2 : P62c
9.CM.05SogdianiteKZr2Li3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05SugiliteKNa2Fe3+2(Li3Si12)O30Hex.
9.CM.05YagiiteNaMg2(AlMg2Si12)O30Hex. 6/mmm (6/m 2/m 2/m)
9.CM.05BerezanskiteKTi2Li3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05DusmatoviteKK2Mn2(Zn2LiSi12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ShibkoviteK2Ca2(Zn3Si12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05AlmaruditeK(◻,Na)2(Mn,Fe,Mg)2[(Be,Al)3Si12]O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
9.CM.05TrattneriteFe3+2(Mg3Si12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05OftedaliteKSc22Be3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.10FaizieviteK2Na(Ca6Na)Ti4Li6[Si6O18]2[Si12O30]F2Tric. 1 : P1

Other InformationHide

Notes:
Insoluble in HCl, HNO3 and H2SO4
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 AluminosugiliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Lucchetti, G., Cortesogno, L., and Palenzona, A. (1988) Low-temperature metamorphic mineral assemblages in Mn-Fe ores from Cerchiara mine (northern Appennine, Italy). Neues Jahrbuch für Mineralogie, Monatshefte: 8: 367-383.
Hirowatari, F. and Fukuoka, M. (1989) Some problems of the studies on the manganese minerals in Japan. Journal of the Mineralogical Society of Japan: 18: 347–365. https://doi.org/10.2465/gkk1952.18.347
Cabella, R., Lucchetti, G., Palenzona, A. (1990) Al-rich, Fe-poor manganoan sugilite in a pectolite-bearing assemblage from Cerchiara Mine (Northern Apennines, Italy). Neues Jahrbuch für Mineralogie Mh.: 10: 443-448.
Nagashima, M., Fukuda, C., Matsumoto, T., Imaoka, T., Odicino, G. and Armellino, G. (2019) Aluminosugilite, IMA 2018-142. CNMNC Newsletter No. 49, June 2019, page xxx. Mineralogical Magazine: 83: 323-xxx.
Nagashima, M., Fukuda, C., Matsumoto, T., Imaoka, T., Odicino, G., and Armellino, G. (2020) Aluminosugilite, KNa2Al2Li3Si12O30, an Al analogue of sugilite, from the Cerchiara mine, Liguria, Italy. European Journal of Mineralogy: 32: 57-66. https://doi.org/10.5194/ejm-32-57-2020

Internet Links for AluminosugiliteHide

Localities for AluminosugiliteHide

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.
Italy (TL)
 
  • Liguria
    • La Spezia Province
      • Borghetto di Vara
Cabella, R., Lucchetti, G., Palenzona, A. (1990) Al-rich, Fe-poor manganoan sugilite in a pectolite-bearing assemblage from Cerchiara Mine (Northern Apennines, Italy). Neues Jahrbuch für Mineralogie Mh.: 10: 443-448; Nagashima, M., Fukuda, C., Matsumoto, T., Imaoka, T., Odicino, G. and Armellino, G. (2019) Aluminosugilite, IMA 2018-142. CNMNC Newsletter No. 49, June 2019, Mineralogical Magazine, 83: 479-483; Nagashima, M., Fukuda, C., Matsumoto, T., Imaoka, T., Odicino, G. , and Armellino, G. (2020) Aluminosugilite, KNa2Al2Li3Si12O30, an Al analogue of sugilite, from the Cerchiara mine, Liguria, Italy. European Journal of Mineralogy, 32, 57-66, https://doi.org/10.5194/ejm-32-57-2020
Japan
 
  • Ehime Prefecture
    • Iyo district
      • Tobe-cho
Hirowatari, F. and Fukuoka, M. (1989) Some problems of the studies on the manganese minerals in Japan. Journal of the Mineralogical Society of Japan, 18, 347–365, https://doi.org/10.2465/gkk1952.18.347; Nagashima, M., Fukuda, C., Matsumoto, T., Imaoka, T., Odicino, G. , and Armellino, G. (2020) Aluminosugilite, KNa2Al2Li3Si12O30, an Al analogue of sugilite, from the Cerchiara mine, Liguria, Italy. European Journal of Mineralogy, 32, 57-66, https://doi.org/10.5194/ejm-32-57-2020
South Africa
 
  • Northern Cape
    • Kalahari manganese field
      • Kuruman
        • N'Chwaning Mines
Frank K. Mazdab collection: "Al-dominant analog of sugilite", sugilite, and associated minerals in thin section [thin section FKM-173] https://www.rockptx.com/fkm-151-to-fkm-175/#FKM-173
 
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