An unusual hydrous yttrium silicate with a KDP-type (monopotassium phosphate) structure.
The X-ray powder diffraction pattern is similar to that of xenotime.

Unique IdentifiersHide

Mindat ID:

42350

Long-form identifier:

mindat:1:1:42350:8

GUID
(UUID V4):

7a0e30d7-3a9a-4f2c-8cfb-791cd4e8dcc5

IMA Classification of Atelisite-(Y)Hide

IMA status:

Approved

IMA Formula:

Y₄Si₃O₈(OH)₈

Approval year:

2010

First published:

2012

Type description reference:

Malcherek, Thomas, Mihailova, Boriana, Schlüter, Jochen, Husdal, Tomas (2012) Atelisite-(Y), a new rare earth defect silicate of the KDP structure type. European Journal of Mineralogy, 24 (6) 1053-1060 doi:10.1127/0935-1221/2012/0024-2242

Classification of Atelisite-(Y)Hide

Strunz-mindat (2024):

9.A0.

9 : SILICATES (Germanates)
A : Nesosilicates
0 :

Mineral SymbolsHide

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

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Symbol	Source	Reference
Ael-Y	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
	The Canadian Mineralogist (2019)	The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of Atelisite-(Y)Hide

Lustre:

Vitreous

Transparency:

Transparent

Colour:

Pale brown to colorless

Streak:

White

Density:

4.26 g/cm³ (Calculated)

Optical Data of Atelisite-(Y)Hide

Type:

Uniaxial (+)

RI values:

n_ω = 1.727 n_ε = 1.800

Max Birefringence:

δ = 0.073

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

High

Chemistry of Atelisite-(Y)Hide

Mindat Formula:

Y₄Si₃O₈(OH)₈

Elements listed:

H, O, Si, Y - search for minerals with similar chemistry

Crystallography of Atelisite-(Y)Hide

Crystal System:

Tetragonal

Class (H-M):

4 2m - Scalenohedral

Space Group:

I4 2d

Setting:

I4 2d

Cell Parameters:

a = 6.947(4) Å, c = 6.133(3) Å

Ratio:

a:c = 1 : 0.883

Unit Cell V:

295.98 Å³

Morphology:

Dipyramidally terminated, short-prismatic habit with a diameter of up to 0.3 mm. Observed forms: {101},{100} and {001}.

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0019605	Atelisite-(Y)	Malcherek T, Mihailova B, Schluter J, Husdal T (2012) Atelisite-(Y), a new rare earth defect silicate of the KDP structure type European Journal of Mineralogy 24 1053-1060		2012	Stetind quarry, Tysfjord, Norway	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Atelisite-(Y)'
loop_
_publ_author_name
'Malcherek T'
'Mihailova B'
'Schluter J'
'Husdal T'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 24 
_journal_year 2012
_journal_page_first 1053
_journal_page_last 1060
_publ_section_title
;
 Atelisite-(Y), a new rare earth defect silicate of the KDP structure type
;
_database_code_amcsd 0019605
_chemical_compound_source 'Stetind quarry, Tysfjord, Norway'
_chemical_formula_sum 'Si.73 (Y.78 Yb.12 Er.05 Dy.03 Gd.02) O4 H2'
_cell_length_a 6.947
_cell_length_b 6.947
_cell_length_c 6.133
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 295.984
_exptl_crystal_density_diffrn      4.331
_symmetry_space_group_name_H-M 'I -4 2 d'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  '1/2-y,-x,3/4+z'
  '-y,1/2-x,1/4+z'
  'y,-x,-z'
  '1/2+y,1/2-x,1/2-z'
  '-x,1/2+y,1/4-z'
  '1/2-x,+y,3/4-z'
  '-x,-y,z'
  '1/2-x,1/2-y,1/2+z'
  '1/2+y,x,3/4+z'
  '+y,1/2+x,1/4+z'
  '-y,x,-z'
  '1/2-y,1/2+x,1/2-z'
  'x,1/2-y,1/4-z'
  '1/2+x,-y,3/4-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Si   0.00000   0.50000   0.25000   0.73000   0.00760
Y   0.00000   0.50000   0.75000   0.78000   0.00860
Yb   0.00000   0.50000   0.75000   0.12000   0.00860
Er   0.00000   0.50000   0.75000   0.05000   0.00860
Dy   0.00000   0.50000   0.75000   0.03000   0.00860
Gd   0.00000   0.50000   0.75000   0.02000   0.00860
O   0.82090   0.54690   0.08520   1.00000   0.01370
H   0.80000   0.68000   0.15000   0.50000   0.04000
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Si 0.00810 0.00810 0.00670 0.00000 0.00000 0.00000
Y 0.00990 0.00990 0.00590 0.00000 0.00000 0.00000
Yb 0.00990 0.00990 0.00590 0.00000 0.00000 0.00000
Er 0.00990 0.00990 0.00590 0.00000 0.00000 0.00000
Dy 0.00990 0.00990 0.00590 0.00000 0.00000 0.00000
Gd 0.00990 0.00990 0.00590 0.00000 0.00000 0.00000
O 0.00930 0.01980 0.01220 -0.00080 -0.00120 0.00400

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
4.581 Å	(45)
3.465 Å	(100)
2.766 Å	(31)
2.596 Å	(58)
2.453 Å	(20)
2.161 Å	(26)
1.841 Å	(23)
1.780 Å	(52)

Comments:

Pattern is similar to that of xenotime.

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 4b: Highly evolved igneous rocks	>3.0
34 : Complex granite pegmatites

Type Occurrence of Atelisite-(Y)Hide

Type Locality:

ⓘ Stetind pegmatite, Narvik, Nordland, Norway

General Appearance of Type Material:

As a late, hydrothermally formed phase which occurs as euhedral microcrystals in dissolution cavities in yttrian fluorite.

Place of Conservation of Type Material:

In the collections of the Mineralogical Museum of the University of Hamburg, Hamburg, Germany, catalogue number NO-004.

Empirical Formula of Type Material:

(Y_3.11Yb_0.46 Er_0.19Dy_0.11Gd_0.09Ho_0.01Tb_0.02)Σ_3.99Si_2.40O₁₆H_10.43

Chemical Analysis of Type Material:

SiO₂	18.73 %
Y₂O₃	45.67 %
Yb₂O₃	11.81 %
Gd₂O₃	2.09 %
Tb₂O₃	0.54 %
Dy₂O₃	2.61 %
Ho₂O₃	0.62 %
Er₂O₃	4.72 %
H₂O calc	12.2 %
Total:	98.99 %

Geological Setting of Type Material:

Granitic pegmatite (NYF type).

Associated Minerals at Type Locality:

Reference:

Malcherek, T., Mihailová, B., Schlüter, J., Husdal, T. (2012): Atelisite-(Y), a new rare earth defect silicate of the KDP structure type. European Journal of Mineralogy, 24: 1053-1060

Download:

http://rruff.info/rruff_1.0/uploads/EJM24_1053.pdf

Synonyms of Atelisite-(Y)Hide

IMA2010-065

Other Language Names for Atelisite-(Y)Hide

German:Atelisit-(Y)

Related Minerals - Strunz-mindat Grouping Hide

9.A0.05

Cayalsite-(Y)

CaY₆Al₂Si₄O₁₈F₆

Orth. mmm (2/m 2/m 2/m) : Pban

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.

Internet Links for Atelisite-(Y)Hide

mindat.org URL:

https://www.mindat.org/min-42350.html
Please feel free to link to this page.

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External Links:

Look for Atelisite-(Y) on Webmineral

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for Atelisite-(Y)Hide

Reference List:

Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2011) New minerals and nomenclature modifications approved in 2011. CNMNC Newsletter No 9. Mineralogical Magazine, 75 (4) 2535-2540 doi:10.1180/minmag.2011.075.4.2535

(2023) Atelisite-(Y) Handbook of Mineralogy. Mineralogical Society of America

Localities for Atelisite-(Y)Hide

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.


China
Guangdong Shaoguan Wengyuan Co. ⓘ Xinfeng deposit	Zhao et al. (2022)

Norway (TL)
Nordland Narvik ⓘ Stetind pegmatite (TL)	Williams et al. (2011) +1 other reference

Atelisite-(Y)

About Atelisite-(Y)Hide