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Chiappinoite-(Y)

A valid IMA mineral species

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Photos of Chiappinoite-(Y) (12)

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Chiappinoite-(Y)

Água de Pau Volcano, São Miguel, Azores, Portugal

Chiappinoite-(Y)

Água de Pau Volcano, São Miguel, Azores, Portugal

Chiappinoite-(Y)

Água de Pau Volcano, São Miguel, Azores, Portugal

Chiappinoite-(Y)

Água de Pau Volcano, São Miguel, Azores, Portugal

Chiappinoite-(Y)

Água de Pau Volcano, São Miguel, Azores, Portugal

Chiappinoite-(Y)

Água de Pau Volcano, São Miguel, Azores, Portugal

Chiappinoite-(Y)

Água de Pau Volcano, São Miguel, Azores, Portugal

Chiappinoite-(Y)

Água de Pau Volcano, São Miguel, Azores, Portugal

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About Chiappinoite-(Y)Hide

Luigi Chiappino

Formula:

Y₂Mn(Si₃O₇)₄

Colour:

Colourless

Lustre:

Vitreous

Hardness:

Specific Gravity:

3.09

Crystal System:

Orthorhombic

Name:

Honours the collector Luigi Chiappino of Milan, Italy, who discovered the mineral.

Type Locality:

ⓘ Água de Pau Volcano, São Miguel, Azores, Portugal

Other silicates with dominant Y and Mn are bussyite-(Y) and perettiite-(Y).

The structure is based on 3-tetrahedra-thick silicate layers comprising sinuous batisite-like chains. 4-membered silicate rings are locaed above and below these chains. ^[8]Y and ^[8]Mn sites are between the silicate layers. The crystal structure is essentially identical to that of the synthetic compounds PrNaSi₆O₁₄ and NdNaSi₆O₁₄, except that these have an additional Na site (12-coordinated) within the "cage" in the silicate layer.

Unique IdentifiersHide

Mindat ID:

46394

Long-form identifier:

mindat:1:1:46394:0

GUID
(UUID V4):

7f06efcd-4161-4365-9df7-51bd2bf18e4e

IMA Classification of Chiappinoite-(Y)Hide

IMA status:

Approved

Approval year:

2014

Classification of Chiappinoite-(Y)Hide

Strunz-mindat (2024):

9.DP.45

9 : SILICATES (Germanates)
D : Inosilicates
P : Transitional ino-phyllosilicate structures

Mineral SymbolsHide

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

Symbol	Source	Reference
Cap-Y	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of Chiappinoite-(Y)Hide

Lustre:

Vitreous

Transparency:

Transparent

Colour:

Colourless

Hardness:

6 on Mohs scale

Comment:

about 6

Tenacity:

Brittle

Cleavage:

Perfect
on {001}.

Fracture:

Irregular/Uneven

Density:

3.09 g/cm³ (Measured) 3.073 g/cm³ (Calculated)

Optical Data of Chiappinoite-(Y)Hide

Type:

Biaxial (-)

RI values:

n_α = 1.000(1) n_β = 1.598(10) n_γ = 1.598(10)

2V:

Measured: 24° (1), Calculated: 25°

Max Birefringence:

δ = 0.598

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

Surface Relief:

Moderate

Dispersion:

Exhibits no dispersion

Pleochroism:

Non-pleochroic

Chemistry of Chiappinoite-(Y)Hide

Mindat Formula:

Y₂Mn(Si₃O₇)₄

Elements listed:

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

Common Impurities:

Ce,Ca,Fe(II),Dy,Na,Nd,Er,Gd,La,Yb

Crystallography of Chiappinoite-(Y)Hide

Crystal System:

Orthorhombic

Class (H-M):

mmm (2/m 2/m 2/m) - Dipyramidal

Space Group:

Ibam

Cell Parameters:

a = 7.5549(3) Å, b = 15.2342(2) Å, c = 19.6418(14) Å

Ratio:

a:b:c = 0.496 : 1 : 1.289

Unit Cell V:

2260.6 Å³

Morphology:

Thin to thick prisms, up to 1 mm long, with blunt chisel-like terminations. Forms observed: {100}, {010}, {001}, {110} and {011}.

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)
0020339	Chiappinoite-(Y)	Kampf A R, Housley R M (2015) Chiappinoite-(Y), Y2Mn(Si3O7)4, a new layer silicate found in peralkaline syenitic ejecta from the Agua de Pau volcano, Azores European Journal of Mineralogy 27 91-97		2015	Agua de Pau volcano, San Miguel Island, Azores District, Portugal	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Chiappinoite-(Y)'
loop_
_publ_author_name
'Kampf A R'
'Housley R M'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 27 
_journal_year 2015
_journal_page_first 91
_journal_page_last 97
_publ_section_title
;
 Chiappinoite-(Y), Y2Mn(Si3O7)4, a new layer silicate found in peralkaline syenitic
 ejecta from the Agua de Pau volcano, Azores
;
_database_code_amcsd 0020339
_chemical_compound_source 'Agua de Pau volcano, San Miguel Island, Azores District, Portugal'
_chemical_formula_sum 'Y1.17 Ce.18 Dy.1 Na.1 Nd.09 Er.08 La.07 Gd.07 Yb.06 Sm.03 Pr.02 Mn.61 Ca.25 Fe.09 Si12 O28'
_cell_length_a 7.5549
_cell_length_b 15.2342
_cell_length_c 19.6418
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 2260.631
_exptl_crystal_density_diffrn      3.074
_symmetry_space_group_name_H-M 'I b a m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,-z'
  '-x,y,1/2+z'
  '1/2-x,1/2+y,+z'
  'x,-y,1/2-z'
  '1/2+x,1/2-y,-z'
  'x,y,-z'
  '1/2+x,1/2+y,1/2-z'
  '-x,-y,z'
  '1/2-x,1/2-y,1/2+z'
  '-x,-y,-z'
  '1/2-x,1/2-y,1/2-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
Y   0.00000   0.22900   0.25000   0.58500   0.00779
Ce   0.00000   0.22900   0.25000   0.09000   0.00779
Dy   0.00000   0.22900   0.25000   0.05000   0.00779
Na   0.00000   0.22900   0.25000   0.05000   0.00779
Nd   0.00000   0.22900   0.25000   0.04500   0.00779
Er   0.00000   0.22900   0.25000   0.04000   0.00779
La   0.00000   0.22900   0.25000   0.03500   0.00779
Gd   0.00000   0.22900   0.25000   0.03500   0.00779
Yb   0.00000   0.22900   0.25000   0.03000   0.00779
Sm   0.00000   0.22900   0.25000   0.01500   0.00779
Pr   0.00000   0.22900   0.25000   0.01000   0.00779
Mn   0.00000   0.00000   0.25000   0.61000   0.01190
Ca   0.00000   0.00000   0.25000   0.25000   0.01190
Fe   0.00000   0.00000   0.25000   0.09000   0.01190
Si1   0.25889   0.07589   0.35271   1.00000   0.00901
Si2   0.14882   0.37659   0.35242   1.00000   0.00910
Si3   0.17597   0.13038   0.50000   1.00000   0.01060
Si4   0.26475   0.33083   0.50000   1.00000   0.00980
O1   0.09100   0.10917   0.31185   1.00000   0.01420
O2   0.23510   0.29947   0.30893   1.00000   0.01260
O3   0.43720   0.13088   0.33201   1.00000   0.01330
O4   0.21590   0.47368   0.33012   1.00000   0.01410
O5   0.24010   0.07713   0.43434   1.00000   0.01730
O6   0.16540   0.36742   0.43380   1.00000   0.01890
O7   0.26410   0.22602   0.50000   1.00000   0.02860
O8   0.46520   0.36300   0.50000   1.00000   0.03240
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
Y 0.00617 0.00770 0.00952 0.00000 -0.00069 0.00000
Ce 0.00617 0.00770 0.00952 0.00000 -0.00069 0.00000
Dy 0.00617 0.00770 0.00952 0.00000 -0.00069 0.00000
Na 0.00617 0.00770 0.00952 0.00000 -0.00069 0.00000
Nd 0.00617 0.00770 0.00952 0.00000 -0.00069 0.00000
Er 0.00617 0.00770 0.00952 0.00000 -0.00069 0.00000
La 0.00617 0.00770 0.00952 0.00000 -0.00069 0.00000
Gd 0.00617 0.00770 0.00952 0.00000 -0.00069 0.00000
Yb 0.00617 0.00770 0.00952 0.00000 -0.00069 0.00000
Sm 0.00617 0.00770 0.00952 0.00000 -0.00069 0.00000
Pr 0.00617 0.00770 0.00952 0.00000 -0.00069 0.00000
Mn 0.01480 0.00810 0.01280 0.00000 0.00000 0.00000
Ca 0.01480 0.00810 0.01280 0.00000 0.00000 0.00000
Fe 0.01480 0.00810 0.01280 0.00000 0.00000 0.00000
Si1 0.00890 0.00920 0.00900 0.00110 -0.00100 -0.00030
Si2 0.01000 0.00880 0.00850 0.00060 -0.00060 -0.00070
Si3 0.01140 0.01160 0.00890 0.00280 0.00000 0.00000
Si4 0.00960 0.01030 0.00930 -0.00090 0.00000 0.00000
O1 0.01110 0.01560 0.01570 0.00120 -0.00240 0.00420
O2 0.01370 0.01030 0.01390 0.00000 0.00160 -0.00250
O3 0.01070 0.01400 0.01540 0.00010 -0.00140 0.00060
O4 0.01780 0.01010 0.01450 -0.00110 -0.00050 -0.00050
O5 0.02280 0.01890 0.01030 0.00250 0.00020 -0.00120
O6 0.02160 0.02480 0.01040 0.00470 -0.00220 -0.00010
O7 0.04000 0.01290 0.03280 0.00060 0.00000 0.00000
O8 0.01230 0.05000 0.03490 -0.01030 0.00000 0.00000

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
9.84 Å	(90)
4.129 Å	(52)
3.977 Å	(48)
3.544 Å	(100)
3.203 Å	(48)
2.999 Å	(71)
2.478 Å	(67)
2.065 Å	(57)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 3a: Earth’s earliest Hadean crust	>4.50
9 : Lava/xenolith minerals (hornfels, sanidinite facies)
Stage 4b: Highly evolved igneous rocks	>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of Chiappinoite-(Y)Hide

Type Locality:

ⓘ Água de Pau Volcano, São Miguel, Azores, Portugal

Place of Conservation of Type Material:

Cotype material is deposited in the collections of the Mineral Sciences Department, Natural History Museum of Los Angeles, USA, catalogue numbers 64166, 64167, 64168, 64169 and 64170

Geological Setting of Type Material:

In peralkaline syenitic ejecta from the Água de Pau volcano.

Synonyms of Chiappinoite-(Y)Hide

IMA2014-040

Other Language Names for Chiappinoite-(Y)Hide

German:Chiappinoit-(Y)

Common AssociatesHide

Associated Minerals Based on Photo Data:

4 photos of Chiappinoite-(Y) associated with Aegirine	NaFe³⁺Si₂O₆
4 photos of Chiappinoite-(Y) associated with Fluornatropyrochlore	(Na,Pb,Ca,REE,U)₂Nb₂O₆F
3 photos of Chiappinoite-(Y) associated with Ferro-katophorite	{Na}{CaNa}{Fe²⁺₄Al}[(AlSi₇)O₂₂](OH)₂
2 photos of Chiappinoite-(Y) associated with Astrophyllite	K₂NaFe²⁺₇Ti₂Si₈O₂₆(OH)₄F
1 photo of Chiappinoite-(Y) associated with Titanite	CaTi(SiO₄)O

Related Minerals - Strunz-mindat Grouping Hide

9.DP.	Ferriprehnite	Ca₂Fe³⁺(Si₃AlO₁₀)(OH)₂	Orth. mm2 : Pma2
9.DP.05	Meliphanite	(Ca,Na)₂(Be,Al)[Si₂O₆(OH,F)]	Tet. 4 : I4
9.DP.15	Leucosphenite	BaNa₄Ti₂B₂Si₁₀O₃₀	Mon. 2/m : B2/m
9.DP.20	Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂	Orth. mm2
9.DP.25	Amstallite	CaAl[(Al,Si)₄O₈(OH)₂](OH)₂ · (H₂O,Cl)	Mon. 2/m : B2/b
9.DP.30	Kvanefjeldite	Na₄(Ca,Mn)(Si₃O₇)₂(OH)₂	Orth. mmm (2/m 2/m 2/m)
9.DP.35	Lemoynite	(Na,K)₂CaZr₂Si₁₀O₂₆ · 5H₂O	Mon. 2/m : B2/b
9.DP.35	Natrolemoynite	Na₄Zr₂Si₁₀O₂₆ · 9H₂O	Mon. 2/m : B2/m
9.DP.35	Hogarthite	(Na,K)₂CaTi₂Si₁₀O₂₆ · 8H₂O	Mon. 2/m : B2/m
9.DP.40	Altisite	Na₃K₆Ti₂Al₂Si₈O₂₆Cl₃	Mon. 2/m : B2/m
9.DP.50	Esquireite	BaSi₆O₁₃ · 7H₂O	Mon. 2 : B2

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 Chiappinoite-(Y)Hide

mindat.org URL:

https://www.mindat.org/min-46394.html
Please feel free to link to this page.

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External Links:

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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 Chiappinoite-(Y)Hide

Reference List:

Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2014) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC), CNMNC Newsletter No. 22. Mineralogical Magazine, 78 (5) 1241-1248 doi:10.1180/minmag.2014.078.5.10

Belakovskiy, D.I., Cámara, F., Gagne, O.C., Uvarova, Y. (2015) New mineral names. American Mineralogist: 100: 2005-2013.

Kampf, A.R., Housley, R.M. (2015) Chiappinoite-(Y), Y₂Mn(Si₃O₇)₄, a new layer silicate found in peralkaline syenitic ejecta from the Água de Pau volcano, Azores. European Journal of Mineralogy: 27: 91-97.

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

Localities for Chiappinoite-(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.

Portugal (TL)

Azores

São Miguel

ⓘ Água de Pau Volcano (TL)

Kampf et al. (2015)

Chiappinoite-(Y)

About Chiappinoite-(Y)Hide

Unique IdentifiersHide

IMA Classification of Chiappinoite-(Y)Hide

Classification of Chiappinoite-(Y)Hide

Mineral SymbolsHide

Physical Properties of Chiappinoite-(Y)Hide

Optical Data of Chiappinoite-(Y)Hide

Chemistry of Chiappinoite-(Y)Hide

Crystallography of Chiappinoite-(Y)Hide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of Chiappinoite-(Y)Hide

Synonyms of Chiappinoite-(Y)Hide

Other Language Names for Chiappinoite-(Y)Hide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for Chiappinoite-(Y)Hide

References for Chiappinoite-(Y)Hide

Localities for Chiappinoite-(Y)Hide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide