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Micheelsenite

A valid IMA mineral species
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02454670014946430908461.jpg
Micheelsenite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
03136160014968537026853.jpg
Micheelsenite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
08691100014977191823647.jpg
Micheelsenite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
02454670014946430908461.jpg
Micheelsenite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
07335530014960981722207.jpg
Micheelsenite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
08361060014960981727606.jpg
Micheelsenite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
02454670014946430908461.jpg
Micheelsenite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
03136160014968537026853.jpg
Micheelsenite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
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About MicheelseniteHide

Formula:
(Ca2Y)Al(PO3OH)(CO3)(OH)6 · 12H2O
Colour:
White to colourless
Lustre:
Vitreous
Hardness:
3½ - 4
Specific Gravity:
2.15
Crystal System:
Hexagonal
Name:
Named by A.M. McDonald, O.V. Petersen, R.A. Gault, O. Johnsen, G. Niedrmayr, F. Brandstätter, and G. Giester, G. in 2001 in honor of Harry Ingvar Micheelsen (1931 - 2020) Danish mineralogist, former Professor of Mineralogy, University of Copenhagen. His specialty was mineralogy of alkaline rocks and he discovered the Nanna pegmatite (one of the type localities).
A late-stage hydrothermal product in alkaline pegmatites.


Unique IdentifiersHide

Mindat ID:
10390
Long-form identifier:
mindat:1:1:10390:5
GUID
(UUID V4):
15339f90-9fa6-417f-9a14-37a12ebab568

IMA Classification of MicheelseniteHide

Classification of MicheelseniteHide

Strunz-mindat (2024):
8.DO.30

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
O : With CO3, SO4, SiO4

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
MsnIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of MicheelseniteHide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
White to colourless
Streak:
White
Hardness:
3½ - 4 on Mohs scale
Cleavage:
Distinct/Good
{1010} and {0001} good
Fracture:
Splintery
Density:
2.15(1) g/cm3 (Measured)    2.17 g/cm3 (Calculated)

Optical Data of MicheelseniteHide

Type:
Uniaxial (-)
RI values:
nω = 1.532(1) nε = 1.503(1)
Max Birefringence:
δ = 0.029
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low

Chemistry of MicheelseniteHide

Mindat Formula:
(Ca2Y)Al(PO3OH)(CO3)(OH)6 · 12H2O
Elements listed:
Al, C, Ca, H, O, P, Y - search for minerals with similar chemistry

Crystallography of MicheelseniteHide

Crystal System:
Hexagonal
Class (H-M):
6 - Pyramidal
Space Group:
P63
Cell Parameters:
a = 10.828(3) Å, c = 10.516(4) Å
Ratio:
a:c = 1 : 0.971
Unit Cell V:
1067.8 ų
Z:
2
Morphology:
Acicular, fibrous crystals, with typical hexagonal cross-sections. Striated along [001], terminated by {001}. In loosely packed spherical,fan-shaped or randomly matted aggregates.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.38 Å(100)
2.491 Å(80)
4.59 Å(70)
2.143 Å(64)
3.36 Å(55)
3.77 Å(50)
4.82 Å(40)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
22 : Hydration and low-𝑇 subsurface aqueous alteration (see also #23)

Type Occurrence of MicheelseniteHide

Co-Type Localities:
ⓘ Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
ⓘ Nanna pegmatite, Narsaarsuup Qaava, Igaliku, Kujalleq, Greenland
General Appearance of Type Material:
As acicular to fibrous crystals in loosely packed aggregates to 3mm in diameter and in bundles of hair-like matted fibers (Mont Saint Hilaire). As white, irregular bundles or partly fan-shaped aggregates of fibrous, acicular crystals (Nanna pegmatite).
Place of Conservation of Type Material:
Canadian Museum of Nature, Ottawa, Ontario, Canada (CMNMC 83049/50) and in the Geological Museum, University of Copenhagen, Denmark
Empirical Formula of Type Material:
(Ca1.96Y1.06Dy0.09Er0.06Gd0.03Ho0.02)Σ3.20Al0.85[(P0.71C0.24S0.04Si0.01)Σ1O3(OH)](CO3)(OH)6 · 12H2O
Chemical Analysis of Type Material:
CaO16.90 %
Al2O36.70 %
Y2O318.07 %
Gd2O30.84 %
Dy2O32.65 %
Ho2O30.51 %
Er2O31.88 %
SiO20.07 %
P2O57.80 %
SO30.53 %
CO28.38 %
H2O43.01 %
Total:107.34 %
Geological Setting of Type Material:
In pegmatites (in socalled "silicate cavities"), seams in hornfels and marble xenoliths at the Poudrette quarry, Mont Saint Hilaire, Quebec, Canada and in the Nanna pegmatite, Greenland.
Associated Minerals at Type Locality:
AegirineAlbiteAncylite-(Ce)CatapleiiteFluorite
MicroclineMonteregianite-(Y)NatroliteNenadkevichiteRhodochrosite
SeranditeNatroliteTitaniteCalcitePyrite
Reference:
McDonald A M, Peterson O V, Gault R A, Johnsen O, Niedermayr G, Brandstätter F, Giester G (2001) Micheelsenite, (Ca,Y)3Al(PO3OH,CO3)(CO3)(OH)6·12H2O, a new mineral from Mont Saint–Hilaire, Quebec, Canada and the Nanna pegmatite, Narsaarsuup Qaava, South Greenland. Neues Jahrbuch für Mineralogie, Monatshefte 2001, 337-351

Synonyms of MicheelseniteHide

Other Language Names for MicheelseniteHide

Simplified Chinese:羟碳磷铝钙石
Traditional Chinese:羥碳磷鋁鈣石

Relationship of Micheelsenite to other SpeciesHide

Member of:
Ettringite Group
Other Members of this group:
BentoriteCa6Cr2(SO4)3(OH)12 · 26H2OTrig. 3m : P3 1c
BuryatiteCa3(Si,Fe3+,Al)(SO4)B(OH)4(OH,O)6 · 12H2OTrig. 3m : P3 1c
CarraraiteCa3(SO4)[Ge(OH)6](CO3) · 12H2OHex.
CharlesiteCa6(Al,Si)2(SO4)2[B(OH)4](OH,O)12 · 26H2OTrig. 3m : P3 1c
ChiyokoiteCa3Si(CO3)[B(OH)4]O (OH)5 · 12H2OHex. 6 : P63
EttringiteCa6Al2(SO4)3(OH)12 · 26H2OTrig. 3m : P3 1c
HielscheriteCa3Si(SO4)(SO3)(OH)6 · 11H2OHex. 6 : P63
ImayoshiiteCa3Al(CO3)[B(OH)4](OH)6 · 12H2OHex. 6 : P63
JouravskiteCa3Mn4+(SO4)(CO3)(OH)6 · 12H2OHex. 6 : P63
KottenheimiteCa 3Si(SO4)2(OH)6 · 12H2O Hex. 6/m : P63/m
SiwaqaiteCa6Al2(CrO4)3(OH)12 · 26H2OTrig. 3m : P3 1c
SturmaniteCa6Fe3+2(SO4)2.5[B(OH)4](OH)12 · 25H2OTrig. 3m : P3 1c
TatarinoviteCa3Al(SO4)[B(OH)4](OH)6 · 12H2OHex. 6 : P63
ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2OHex. 6 : P63
UM2008-07-CO:AlBCaHSSiCa6(Al,Si)2(CO3,SO4)2[B(OH)4](OH,O)12 · 26H2O
Unnamed (possible Mn(IV) analogue of Sturmanite)Ca6Mn4+2(SO4)2[B(OH)4](OH)10O2 · nH2O

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Micheelsenite associated with Calcioancylite-(Ce)(Ce,Ca,Sr)CO3(OH,H2O)
2 photos of Micheelsenite associated with CatapleiiteNa2Zr(Si3O9) · 2H2O
1 photo of Micheelsenite associated with RhodochrositeMnCO3
1 photo of Micheelsenite associated with Ancylite-(Ce)CeSr(CO3)2(OH) · H2O
1 photo of Micheelsenite associated with NafertisiteNa3Fe2+10Ti2(Si6O17)2O2(OH)6F(H2O)2
1 photo of Micheelsenite associated with AstrophylliteK2NaFe2+7Ti2Si8O26(OH)4F
1 photo of Micheelsenite associated with AegirineNaFe3+Si2O6
1 photo of Micheelsenite associated with AnalcimeNa(AlSi2O6) · H2O

Related Minerals - Strunz-mindat GroupingHide

8.DO.WhiterockiteCaMgMn3+3O2(PO4)2(CO3)F · 5H2OMon. 2/m : B2/m
8.DO.05GirvasiteNaCa2Mg3(PO4)3(CO3)(H2O)6Mon. 2/m : P21/b
8.DO.10VoggiteNa2Zr(PO4)(CO3)(OH) · 2H2OMon. 2/m
8.DO.15PeisleyiteNa2Al9[(P,S)O4]8(OH)6 · 28H2OTric. 1 : P1
8.DO.20PerhamiteCa3Al7.7Si3P4O23.5(OH)14.1 · 8H2OTrig. 3m (3 2/m) : P3m1
8.DO.20KrásnoiteCa3Al7.7Si3P4O23.5(OH)12.1F2 · 8H2OTrig. 3m (3 2/m) : P3m1
8.DO.25Saryarkite-(Y)Ca(Y,Th)Al5(SiO4)2(PO4,SO4)2(OH)7 · 6H2OTet. 4 2 2
8.DO.40Parwanite(Na,K)(Mg,Ca)4Al8(PO4)8(CO3)(OH)7 · 30H2OMon. 2 : P2
8.DO.45SkorpioniteCa3Zn2(PO4)2(CO3)(OH)2 · H2OMon. 2/m : B2/b
8.DO.50Jörgkellerite(Na,◻)3Mn3+3(PO4)2(CO3)(O,OH)2 · 5H2OTrig. 3 : P3
8.DO.55JuansilvaiteNa5Al3[AsO3(OH)]4[AsO2(OH)2]2(SO4)2 · 4H2OMon. 2/m : B2/b
8.DO.60VanderheydeniteZn6(PO4)2(SO4)(OH)4 · 7H2OMon. 2/m

Fluorescence of MicheelseniteHide

In UV light:
None observed

Other InformationHide

Notes:
Effervesces strongly in dilute HCl.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for MicheelseniteHide

References for MicheelseniteHide

Localities for MicheelseniteHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Canada (TL)
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
McDonald et al. (2001)
Greenland (TL)
 
  • Kujalleq
    • Igaliku
      • Narsaarsuup Qaava
McDonald et al. (2001) +2 other references
Norway
 
  • Vestfold
    • Larvik
      • Hedrum
        • Lågendalen
Berge (2011)
      • Malerød
- (n.d.)
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