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Ussingite

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Niels Viggo Ussing
Formula:
Na2AlSi3O8OH
Colour:
Pale to medium violet, reddish violet; sometimes barely tinted purple
Lustre:
Sub-Vitreous
Hardness:
6 - 7
Specific Gravity:
2.48
Crystal System:
Triclinic
Name:
Named after Niels Viggo Ussing (July 14, 1864-July 23, 1911), Professor of Mineralogy, University of Copenhagen, Denmark.
This page provides mineralogical data about Ussingite.


Classification of Ussingite

Approved, 'Grandfathered' (first described prior to 1959)
9.EH.20

9 : SILICATES (Germanates)
E : Phyllosilicates
H : Transitional structures between phyllosilicate and other silicate units
76.3.3.1

76 : TECTOSILICATES Al-Si Framework
3 : Al-Si Framework with other Be/Al/Si frameworks
16.2.3

16 : Silicates Containing Aluminum and other Metals
2 : Aluminosilicates of Na

Physical Properties of Ussingite

Sub-Vitreous
Transparency:
Transparent, Translucent
Colour:
Pale to medium violet, reddish violet; sometimes barely tinted purple
Streak:
white
Hardness:
6 - 7 on Mohs scale
Tenacity:
Brittle
Fracture:
Irregular/Uneven
Density:
2.48 g/cm3 (Measured)    2.51 g/cm3 (Calculated)

Optical Data of Ussingite

Type:
Biaxial (+)
RI values:
nα = 1.504 nβ = 1.509 nγ = 1.545
2V:
Measured: 32° to 39°, Calculated: 42°
Birefringence:
0.041
Max Birefringence:
δ = 0.041
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
none
Optical Extinction:
Z angle b = 3˚

Chemical Properties of Ussingite

Formula:
Na2AlSi3O8OH
IMA Formula:
Na2AlSi3O8(OH)
Common Impurities:
Ca,K,Cl,H2O,S

Crystallography of Ussingite

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.256 Å, b = 7.686 Å, c = 8.683 Å
α = 90.75°, β = 99.75°, γ = 122.48°
Ratio:
a:b:c = 0.944 : 1 : 1.13
Unit Cell V:
399.44 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals uncommon; blocky to tabular with dominant pinacoidal forms {100}, {010}, and {001}
Twinning:
{010}

X-Ray Powder Diffraction

Powder Diffraction Data:
d-spacingIntensity
6.88 (70)
6.35 (90)
4.92 (70)
4.18 (70)
3.84 (70)
3.47 (70)
2.95 (100)
2.69 (100)
Comments:
14-426

Type Occurrence of Ussingite

Geological Setting of Type Material:
Syenite pegmatite, also sodalite-bearing xenoliths

Other Language Names for Ussingite

German:Ussingit
Simplified Chinese:紫脆石
紫脆云母
Spanish:Ussingita
Traditional Chinese:紫脆石
紫脆雲母

Common Associates

Associated Minerals Based on Photo Data:
Serandite44 photos of Ussingite associated with Serandite on mindat.org.
Vuonnemite44 photos of Ussingite associated with Vuonnemite on mindat.org.
Chkalovite27 photos of Ussingite associated with Chkalovite on mindat.org.
Sodalite22 photos of Ussingite associated with Sodalite on mindat.org.
Steenstrupine-(Ce)21 photos of Ussingite associated with Steenstrupine-(Ce) on mindat.org.
Umbozerite18 photos of Ussingite associated with Umbozerite on mindat.org.
Manganoneptunite17 photos of Ussingite associated with Manganoneptunite on mindat.org.
Aegirine14 photos of Ussingite associated with Aegirine on mindat.org.
Tugtupite12 photos of Ussingite associated with Tugtupite on mindat.org.
Cleiophane12 photos of Ussingite associated with Cleiophane on mindat.org.

Related Minerals - Nickel-Strunz Grouping

9.EH.05ManganoneptuniteNa2KLiMn2+2Ti2Si8O24
9.EH.05NeptuniteNa2KLiFe2+2Ti2Si8O24
9.EH.05WatatsumiiteNa2KLi(Mn2+,Fe2+)2V4+2[Si8O24]
9.EH.05MagnesioneptuniteKNa2Li(Mg,Fe)2Ti2Si8O24
9.EH.10GrumantiteNa(HSi2O5) · H2O
9.EH.15SarcoliteNa4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)
9.EH.25Leifite(Na,H2O)Na6[Be2Al2(Al,Si)Si15O39]F2
9.EH.25Telyushenkoite(Cs,Na,K)Na6[F2|Be2Al3Si15O39]
9.EH.25EirikiteKNa6Be2(Si15Al3)O39F2
9.EH.30NafertisiteNa3Fe2+10Ti2(Si6O17)2O2(OH)6F(H2O)2

Related Minerals - Hey's Chemical Index of Minerals Grouping

16.2.1AlbiteNa(AlSi3O8)
16.2.2AnalcimeNa(AlSi2O6) · H2O
16.2.4ParagoniteNaAl2(AlSi3O10)(OH)2
16.2.5NatroliteNa2Al2Si3O10 · 2H2O
16.2.6Tetranatrolite
16.2.7ParanatroliteNa2Al2Si3O10 · 3H2O
16.2.8EphesiteLiNaAl2(Al2Si2O10)(OH)2
16.2.9Rectorite(Na,Ca)Al4((Si,Al)8O20)(OH)4 · 2H2O
16.2.10JadeiteNa(Al,Fe3+)Si2O6
16.2.11Brammallite(Na,H3O)(Al,Mg,Fe)2((Si,Al)4O10)(OH)2

Fluorescence of Ussingite

Not fluorescent

Other Information

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 Ussingite

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Meddelelser om Grønland (1914): 51: 105.
Zeitschrift für Kristallographie (1915): 54: 120.
American Mineralogist (1974): 59: 335-340.
Mineralogical Record (1990): 21: 284.
Johnson, E.A. and Rossman, G.R. (2004) An infrared and 1H MAS NMR investigation of strong hydrogen bonding in ussingite, Na2Ali3O8(OH). Physics and Chemistr of Minerals: 31: 115-121.

Internet Links for Ussingite

mindat.org URL:
https://www.mindat.org/min-4122.html
Please feel free to link to this page.

Localities for Ussingite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Canada
 
  • Newfoundland and Labrador
    • Labrador
      • Seal Lake alkaline complex (Letitia Lake)
GSC locality database; GSC database locality No. 4100
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
[MinRec 21:343-344]; Pekov, I. et al (2003): New Data on Minerals: 38: 20-33.
      • Lajemmerais RCM
        • Varennes & St-Amable
          • Saint-Amable sill
HORVÁTH, L. (2010) The minerals of the Saint-Amable sill: an update. MICRONEWS 44(4), 23-28.
Greenland
 
  • Kujalleq
    • Narsaq
Petersen, O.V. (2001): List of all minerals identified in the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin. 190, 25-33; Andersen, T., & Friis, H. (2015). The transition from agpaitic to hyperagpaitic magmatic crystallization in the Ilímaussaq alkaline complex, South Greenland. Journal of Petrology, 56(7), 1343-1364.
Bøggild, O.B. (1953): The Mineralogy of Greenland. Meddelelser om Grønland, Bd. 149. Nr. 3. 445 pages. (p.396)
Sørensen, H., Larsen, L.M. (2001): The hyper-agpaitic stage in the evolution of the Ilimaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin. 190, 83-94
Karup-Moeller, S. (1976): Gmelinite and Herschelite from the Ilimaussaq Intrusion in South Greenland, Mineralogical Magazine, Vol. 40, 867-873
            • Lilleelv
Pavel Karthasov photo, (photo-203416)
Karup-Moeller, S., Makovicky, E. (1974): Skinnerite, a new Sulfosalt from the Ilimaussaq Alkaline Intrusion, South Greenland, American Mineralogist, Vol. 59, 889-895; Karup-Møller, S., Makovicky, E. (1974): Skinnerite, a new Sulfosalt from the Ilimaussaq Alkaline Intrusion, South Greenland. American Mineralogist. 59, 889-895
Sørensen, H., Leonardsen, E.S. & Petersen, O.V. (1970): Trona and Thermonatrite from the Ilimaussaq alkaline intrusion, south Greenland. Contribution to the mineralogy of Ilimaussaq, no. 17. Bulletin of the Geological Society of Denmark. 20, 1-19
Cole, M. (2003): Fluorescent Minerals of the Ilimaussaq Complex, Greenland, MinerShop 2003
          • Kvanefjeld Uranium deposit
Pekov,I.V. & Ekimenkova, I.A. (2001): Two new rare-earth-rich mineral associations in the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin 190, 143-144
        • Taseq area
Karup-Moeller, S., Makovicky E. (2001): Thalcusite from Nakkaalaaq, the Ilimaussaq alkaline complex, South Greenland, South Greenland, Geology of Greenland Survey Bulletin, 190, 127-130; Medd. Grönland, 181(7),3{7. (2) (1969); Amer. Mineral., 54, 992{993 (abs. ref. 1)
Semenov, E.I., Kazakova, M.E., Bukin, V.J. (1968): Ilimaussite, a new rare earth – niobium – barium silicate, from Ilimaussaq, South Greenland, Medd. Groenland, Vol. 181 (7), 3-7
- Karup-Moeller, S., Makovicky E. (2001): Thalcusite from Nakkaalaaq, the Ilimaussaq alkaline complex, South Greenland, South Greenland, Geology of Greenland Survey Bulletin, 190, 127-130; Cole, M. (2003): Fluorescent Minerals of the Ilimaussaq Complex, Greenland, MinerShop 2003
        • Tunulliarfik Fjord (Tunugdliarfik)
          • Tugtup Agtakôrfia (Tuttup Attakoorfia)
Andersen, E.K., Danø, M., and Peteresen, O.V. (1969): A tetragonal natrolite. Contribution to the mineralogy of Ilímaussaq, No 13. Meddelelser om Grønland, 181, (10), 1-19
Russia
 
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Khibiny Massif
Pekov, I.V. & Podlesnyi, A.S. (2004): Kukisvumchorr Deposit: Mineralogy of Alkaline Pegmatites and Hydrotermalites. Mineralogical Almanac, vol. 7, 140 pages + xxiv photo's pages
P Haas collection
        • Lovozero Massif
Pekov, I. et al (2003): New Data on Minerals: 38: 20-33. ; Pekov, I.V. (2000): Lovozero Massif. Moscow, Ocean Pictures Ltd, 480 pp.; Yakovenchik, V.N., Ivaniuk, G.Yu., Pakhomovsky, Ya.A., Selivanova, E.A., Men'shikov, Yu.P., Korchak, J.A., Krivovichev, S.V., Spiridonova, D.V., Zalkind, O.A. (2010): Punkaruaivite, Li{Ti2(OH)2[Si4O11(OH)]}•H2O, a new mineral species from hydrothermalites of Khibiny and Lovozero alkaline massifs (Kola Peninsula, Russia). Canadian Mineralogist, 48, 41-50.
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Lapis, 4/97, Ivanjuk et al.; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Pavel M. Kartashov data
Zapiski Vserossijskogo Mineralogicheskogo Obshchestva 130, issue 2, 53-58
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Pekov, I.V. (2000): Lovozero Massif. Moscow, Ocean Pictures Ltd, 480 pp.
            • Second Eastern Stream
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
            • Karnasurt underground mine
              • Kedyk area
American Mineralogist: 90: 1467-1468.; ZVMO 136(4),63-71(2007)
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Pekov, I.V. (2000): Lovozero Massif. Moscow, Ocean Pictures Ltd, 480 pp.; Yakovenchuk, V. N., Ivanyuk, G. Y., Krivovichev, S. V., Pakhomovsky, Y. A., Selivanova, E. A., Korchak, J. A., ... & Zalkind, O. A. (2011). Eliseevite, Na1. 5Li [Ti2Si4O12. 5 (OH) 1.5]∙ 2H2O, a new microporous titanosilicate from the Lovozero alkaline massif (Kola Peninsula, Russia). American Mineralogist, 96(10), 1624-1629.
Ermolaeva, V.N., Pekov, I.V., Chukanov, N.V., Zadov, A.E. (2007): Geology of Ore Deposits 49(8), 758-775.
Ermolaeva, V.N., Pekov, I.V., Chukanov, N.V., Zadov, A.E. (2007): Geology of Ore Deposits 49(8), 758-775.
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