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Micheelsenite

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About MicheelseniteHide

Formula:
(Ca2Y)Al(PO3OH)(CO3)(OH)6 · 12H2O
Colour:
White to colourless
Lustre:
Vitreous
Hardness:
3½ - 4
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.


Classification of MicheelseniteHide

Approved
First published:
2001
8.DO.30

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

Physical Properties of MicheelseniteHide

Vitreous
Transparency:
Transparent
Colour:
White to colourless
Streak:
White
Hardness:
3½ - 4 on Mohs scale
Cleavage:
Distinct/Good
{10-10} and {0001} good
Fracture:
Splintery

Optical Data of MicheelseniteHide

Type:
Uniaxial (-)
RI values:
nω = 1.532 nε = 1.503
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

Chemical Properties of MicheelseniteHide

Formula:
(Ca2Y)Al(PO3OH)(CO3)(OH)6 · 12H2O
IMA Formula:
(Ca,Y)3Al(PO3OH)(CO3)(OH)6 · 12H2O

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):

Type Occurrence of MicheelseniteHide

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).
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.
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

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:
3 photos of Micheelsenite associated with Calcioancylite-(Ce)(Ce,Ca,Sr)CO3(OH,H2O)
1 photo of Micheelsenite associated with RhodochrositeMnCO3
1 photo of Micheelsenite associated with CatapleiiteNa2Zr(Si3O9) · 2H2O

Related Minerals - Nickel-Strunz GroupingHide

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

Fluorescence of MicheelseniteHide

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.

References for MicheelseniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
McDonald, A.M., Petersen, O.V., Gault, R.A., Johnsen, O., Niedrmayr, G., Brandstätter, F. & Giester, G. (2001) Micheelsenite,(Ca,Y)3Al(PO3OH,CO3)(CO3)(OH)6 ·12H2O, a new mineral from Mont Saint-Hilaire, Québec, Canada and the Nanna pegmatite, Narsaarsuup Qaava, South Greenland. Neues Jahrbuch für Mineralogie, Monatshehefte: 8: 337-351.
Jambor, J.L., Roberts, A.C. (2002) New mineral names. American Mineralogist: 87: 355-358.
Mandarino, J.A. (2001) New minerals. The Canadian Mineralogist: 39: 1751-1760.

Internet Links 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 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.
Canada (TL)
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
McDonald, A.M., Petersen, O.V., Gault, R.A., Johnsen, O., Niedrmayr, G., Brandstätter, F. & Giester, G.(2001): Micheelsenite,(Ca,Y)3Al(PO3OH,CO3)(CO3)(OH)6 · 12H2O, a new mineral from Mont Saint-Hilaire, Québec, Canada and the Nanna pegmatite, Narsaarsuup Qaava, South Greenland. Neues Jahrbuch fur Mineralogie, Monatshehefte, 2001 (8), 337-351. [MinRec 33:165]
Greenland (TL)
 
  • Kujalleq
    • Igaliku
      • Narsaarsuup Qaava
[MinRec 33:165]; McDonald, A.M., Petersen, O.V., Gault, R.A., Johnsen, O., Niedrmayr, G., Brandstätter, F. & Giester, G.(2001): Micheelsenite,(Ca,Y)3Al(PO3OH,CO3)(CO3)(OH)6 · 12H2O, a new mineral from Mont Saint-Hilaire, Québec, Canada and the Nanna pegmatite, Narsaarsuup Qaava, South Greenland. Neues Jahrbuch fur Mineralogie, Monatshehefte, 2001 (8), 337-351
Norway
 
  • Vestfold og Telemark
    • Larvik
      • Hedrum
        • Lågendalen
Berge, S. A. (2011): Micheelsenitt-et nytt mineral for Norge. Stein. 8 (2): 12-13
      • Malerød
https://e-rocks.com/item/jyj547164/micheelsenite (with analytical data)
 
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