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Stoppaniite

A valid IMA mineral species

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Photos of Stoppaniite (7)

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Stoppaniite

Capranica, Viterbo Province, Lazio, Italy

Stoppaniite

Capranica, Viterbo Province, Lazio, Italy

Stoppaniite

Capranica, Viterbo Province, Lazio, Italy

Stoppaniite

Capranica, Viterbo Province, Lazio, Italy

Stoppaniite

Capranica, Viterbo Province, Lazio, Italy

Stoppaniite

Capranica, Viterbo Province, Lazio, Italy

Stoppaniite

Capranica, Viterbo Province, Lazio, Italy

Stoppaniite

Capranica, Viterbo Province, Lazio, Italy

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About StoppaniiteHide

Formula:

Be₃Fe³⁺₂(Si₆O₁₈) · H₂O

The formula is simplified; the real formula is very complex (Della Ventura et al., 2000): (Fe,Al,Mg)₄(Be₆Si₁₂O₃₆)^.(H₂O)₂(Na,◻).

Colour:

Light blue

Lustre:

Vitreous

Hardness:

7½

Specific Gravity:

2.79

Crystal System:

Hexagonal

Member of:

Beryl Group

Name:

Named after Francesco Saverio Stoppani (b. 1947), lawyer from Rome (Italy), collector of minerals and coauthor of "I minerali del Lazio (1982)".

Type Locality:

ⓘ Capranica, Viterbo Province, Lazio, Italy

Isostructural with:

Beryl

Found in miarolitic cavities in syenite ejecta in pyroclastic breccia, Capranica, Viterbo.

Unique IdentifiersHide

Mindat ID:

7315

Long-form identifier:

mindat:1:1:7315:4

GUID
(UUID V4):

2bc71590-39fe-4e02-84fc-c85a5c6d3179

IMA Classification of StoppaniiteHide

IMA status:

Approved

IMA Formula:

Fe³⁺₂Be₃Si₆O₁₈ · H₂O

Approval year:

1996

First published:

1998

Classification of StoppaniiteHide

Strunz-mindat (2024):

9.CJ.05

9 : SILICATES (Germanates)
C : Cyclosilicates
J : [Si₆O₁₈]₁₂- 6-membered single rings (sechser-Einfachringe), without insular complex anions

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
Spp	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 StoppaniiteHide

Lustre:

Vitreous

Transparency:

Transparent

Colour:

Light blue

Streak:

White

Hardness:

7½ on Mohs scale

Tenacity:

Brittle

Parting:

{001} basal parting.

Density:

2.79(3) g/cm³ (Measured) 2.811 g/cm³ (Calculated)

Optical Data of StoppaniiteHide

Type:

Uniaxial (-)

RI values:

n_ω = 1.625 n_ε = 1.619

Max Birefringence:

δ = 0.006

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

Surface Relief:

Moderate

Pleochroism:

Weak

Comments:

Colorless to very light blue.

Chemistry of StoppaniiteHide

Mindat Formula:

Be₃Fe³⁺₂(Si₆O₁₈) · H₂O

The formula is simplified; the real formula is very complex (Della Ventura et al., 2000): (Fe,Al,Mg)₄(Be₆Si₁₂O₃₆)^.(H₂O)₂(Na,◻).

Elements listed:

Be, Fe, H, O, Si - search for minerals with similar chemistry

Crystallography of StoppaniiteHide

Crystal System:

Hexagonal

Class (H-M):

6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal

Space Group:

P6/mcc

Cell Parameters:

a = 9.346 Å, c = 9.213 Å

Ratio:

a:c = 1 : 0.986

Unit Cell V:

696.92 Å³

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)
0006751	Stoppaniite	Ferraris G, Prencipe M, Rossi P (1998) Stoppaniite, a new member of the beryl group: crystal structure and crystal-chemical implications European Journal of Mineralogy 10 491-496		1998		0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Stoppaniite'
loop_
_publ_author_name
'Ferraris G'
'Prencipe M'
'Rossi P'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 10 
_journal_year 1998
_journal_page_first 491
_journal_page_last 496
_publ_section_title
;
 Stoppaniite, a new member of the beryl group: crystal structure
 and crystal-chemical implications
;
_database_code_amcsd 0006751
_chemical_formula_sum '(Fe1.22 Al.42 Mg.36) (Be3 Si6) Na.55 (O19 H2)'
_cell_length_a 9.397
_cell_length_b 9.397
_cell_length_c 9.202
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 703.706
_exptl_crystal_density_diffrn      2.843
_symmetry_space_group_name_H-M 'P 6/m c c'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-x+y,1/2+z'
  'x,x-y,1/2-z'
  '-x+y,-x,-z'
  'x-y,x,z'
  '-y,-x,1/2+z'
  'y,x,1/2-z'
  'y,-x+y,-z'
  '-y,x-y,z'
  'x-y,-y,1/2+z'
  '-x+y,y,1/2-z'
  'x,y,-z'
  '-x,-y,z'
  'x,x-y,1/2+z'
  '-x,-x+y,1/2-z'
  'x-y,x,-z'
  '-x+y,-x,z'
  'y,x,1/2+z'
  '-y,-x,1/2-z'
  '-y,x-y,-z'
  'y,-x+y,z'
  '-x+y,y,1/2+z'
  'x-y,-y,1/2-z'
  '-x,-y,-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
FeM   0.33333   0.66667   0.25000   0.61000   0.01300
AlM   0.33333   0.66667   0.25000   0.21000   0.01300
MgM   0.33333   0.66667   0.25000   0.18000   0.01300
BeT*   0.50000   0.00000   0.25000   0.66667   0.01300
SiT*   0.50000   0.00000   0.25000   0.33333   0.01300
BeT*   0.37990   0.10690   0.00000   0.16667   0.01200
SiT*   0.37990   0.10690   0.00000   0.83333   0.01200
NaA*   0.00000   0.00000   0.00000   0.55000   0.03800
WatA*   0.00000   0.00000   0.25000   1.00000   0.05700
O1   0.30050   0.22560   0.00000   1.00000   0.01800
O2   0.48900   0.13530   0.14700   1.00000   0.02200

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
3.278 Å	(very strong)
8.12 Å	(strong)
2.903 Å	(strong)
4.00 Å	(medium)
2.553 Å	(medium weak)
1.752 Å	(medium weak)
4.60 Å	(weak)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 3a: Earth’s earliest Hadean crust	>4.50
10 : Basalt-hosted zeolite minerals
Stage 4b: Highly evolved igneous rocks	>3.0
34 : Complex granite pegmatites

Type Occurrence of StoppaniiteHide

Type Locality:

ⓘ Capranica, Viterbo Province, Lazio, Italy

General Appearance of Type Material:

Transparent, light-blue, hexagonal-prismatic euhedral crystals, up to 0.5 mm in length.

Place of Conservation of Type Material:

Museum of Mineralogy, University of Rome, Italy, MMUR-29900/1.
Natural History Museum, Paris, France, 198.14.

Geological Setting of Type Material:

Miarolitic cavities of a volcanic ejectum.

Associated Minerals at Type Locality:

Biotite	Quartz	Sanidine	Hematite	Danburite
Helvine	Hellandite	Allanite-(Ce)

Synonyms of StoppaniiteHide

IMA1996-008

Other Language Names for StoppaniiteHide

German:Stoppaniit

Russian:Стоппаниит

Spanish:Stoppaniita

Relationship of Stoppaniite to other SpeciesHide

Member of:

Beryl Group

Other Members of this group:

Avdeevite	NaAl₄(Be₅Li)(Si₆O₁₈)₂(H₂O)_1-2	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
Bazzite	Be₃Sc₂(Si₆O₁₈)	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Beryl	Be₃Al₂(Si₆O₁₈)	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Johnkoivulaite	Cs[Be₂B]Mg₂Si₆O₁₈	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Pezzottaite	Cs(Be₂Li)Al₂(Si₆O₁₈)	Trig. 3 : R3

Common AssociatesHide

Associated Minerals Based on Photo Data:

1 photo of Stoppaniite associated with Sanidine

K(AlSi₃O₈)

Related Minerals - Strunz-mindat Grouping Hide

9.CJ.	Avdeevite	NaAl₄(Be₅Li)(Si₆O₁₈)₂(H₂O)_1-2	Hex. 6/mmm (6/m 2/m 2/m) : P6₃/mmc
9.CJ.	Nakkaalaaqite	K₂[Na₃Ca]LiCa₂Ti₂Be₄Si₁₂O₃₈	Orth. mmm (2/m 2/m 2/m) : Fddd
9.CJ.	Zolotarevite	Na₅Zr[Si₆O₁₅(OH)₃] · ₃H₂O	Trig. 3m (3 2/m) : R3m
9.CJ.	Beryllocordierite-Na	NaMg₄(Al₅Be)(AlSi₅O₁₈)₂ · 2H₂O	Orth. mmm (2/m 2/m 2/m) : Cccm
9.CJ.	Beryllosachanbińskiite-Na	NaMn₄(Al₅Be)(AlSi₅O₁₈)₂ · 2H₂O	Orth. mmm (2/m 2/m 2/m) : Cccm
9.CJ.05	Bazzite	Be₃Sc₂(Si₆O₁₈)	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CJ.05	Beryl	Be₃Al₂(Si₆O₁₈)	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CJ.05	Indialite	Mg₂Al₃(AlSi₅O₁₈)	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CJ.05 va	Vorobyevite	Be₃Al₂(Si₆O₁₈)
9.CJ.05	Ferroindialite	(Fe²⁺,Mg)₂Al₄Si₅O₁₈	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CJ.05	Johnkoivulaite	Cs[Be₂B]Mg₂Si₆O₁₈	Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CJ.10	Cordierite	(Mg,Fe)₂Al₃(AlSi₅O₁₈)	Orth. mmm (2/m 2/m 2/m) : Cccm
9.CJ.10	Sekaninaite	(Fe,Mg)₂Al₃(AlSi₅O₁₈)	Orth. mmm (2/m 2/m 2/m) : Cccm
9.CJ.15a	Combeite	Na_4.5Ca_3.5Si₆O_17.5(OH)_0.5	Trig. 3m (3 2/m) : R3m
9.CJ.15b	Imandrite	Na₁₂Ca₃Fe³⁺₂(Si₆O₁₈)₂	Orth. mmm (2/m 2/m 2/m)
9.CJ.15a	Kazakovite	Na₆Mn²⁺Ti(Si₆O₁₈)	Trig. 3m (3 2/m) : R3m
9.CJ.15c	Koashvite	Na₆(Ca,Mn)(Ti,Fe)Si₆O₁₈ · H₂O	Orth. mmm (2/m 2/m 2/m)
9.CJ.15a	Lovozerite	Na₂Ca(Zr,Ti)(Si₆O₁₂)[(OH)₄O₂] · H₂O	Trig. 3 : R3
9.CJ.15a	Tisinalite	Na₃H₃(Mn,Ca,Fe)TiSi₆(O,OH)₁₈ · 2H₂O	Trig. 3m (3 2/m)
9.CJ.15a	Zirsinalite	Na₆(Ca,Mn²⁺,Fe²⁺)Zr(Si₆O₁₈)	Trig. 3m (3 2/m) : R3m
9.CJ.15a	Litvinskite	Na₂(◻,Na,Mn)ZrSi₆O₁₂(OH,O)₆	Mon. m : Bm
9.CJ.15a	Kapustinite	Na₆ZrSi₆O₁₆(OH)₂	Mon. 2/m : B2/m
9.CJ.15a	Townendite	Na₈ZrSi₆O₁₈	Trig. 3m (3 2/m) : R3m
9.CJ.25	Baratovite	KCa₇(Ti,Zr)₂Li₃Si₁₂O₃₆F₂	Mon. 2/m : B2/b
9.CJ.25	Katayamalite	KLi₃Ca₇Ti₂(SiO₃)₁₂(OH)₂	Mon. 2/m : B2/b
9.CJ.25	Aleksandrovite	KCa₇Sn₂Li₃Si₁₂O₃₆F₂	Mon. 2/m : B2/b
9.CJ.30	Dioptase	CuSiO₃ · H₂O	Trig. 3 : R3
9.CJ.35	Kostylevite	K₂Zr(Si₃O₉) · H₂O	Mon. 2/m : P2₁/b
9.CJ.40	Petarasite	Na₅Zr₂(Si₆O₁₈)(Cl,OH) · 2H₂O	Mon. 2/m : P2₁/m
9.CJ.45	Gerenite-(Y)	(Ca,Na)₂(Y,REE)₃Si₆O₁₈ · 2H₂O	Tric. 1 : P1
9.CJ.50	Odintsovite	K₂Na₄Ca₃Ti₂Be₄Si₁₂O₃₈	Orth. mmm (2/m 2/m 2/m) : Fddd
9.CJ.55	Mathewrogersite	Pb₇FeAl₃GeSi₁₂O₃₆(OH,H₂O)₆	Trig.
9.CJ.60	Pezzottaite	Cs(Be₂Li)Al₂(Si₆O₁₈)	Trig. 3 : R3

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 StoppaniiteHide

mindat.org URL:

https://www.mindat.org/min-7315.html
Please feel free to link to this page.

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External Links:

Look for Stoppaniite 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 StoppaniiteHide

Reference List:

Terra Abstracts: 8: 21.

Ferraris, G., Prencipe, M., Rossi, P. (1998): Stoppaniite, a new member of the beryl group: crystal structure and crystal-chemical implications. European Journal of Mineralogy, 10, 491-496.

Jambor, J.L., Kovalenker, V.A., Roberts, A.C. (1999) New mineral names. American Mineralogist, 84, 1685-1688.

Della Ventura, Giancarlo, Rossi, Paolo, Parodi, Gian Carlo, Mottana, Annibale, Raudsepp, Mati, Prencipe, Mauro (2000) Stoppaniite, (Fe,Al,Mg)₄(Be₆Si₁₂O₃₆)·(H₂O)₂(Na,□) a new mineral of the beryl group from Latium (Italy) European Journal of Mineralogy, 12 (1) 121-127 doi:10.1127/0935-1221/2000/0012-0121

Jambor, John L., Puziewicz, Jacek, Roberts, Andrew C. (2000) New Mineral Names. American Mineralogist, 85 (11-12) 1843-1847

(2023) Stoppaniite. Handbook of Mineralogy. Mineralogical Society of America

Localities for StoppaniiteHide

ⓘ - 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.


Italy (TL)
Lazio Viterbo Province ⓘ Capranica (TL)	European Journal of Mineralogy (1998) +3 other references
ⓘ Vetralla

Stoppaniite

About StoppaniiteHide

Unique IdentifiersHide

IMA Classification of StoppaniiteHide

Classification of StoppaniiteHide

Mineral SymbolsHide

Physical Properties of StoppaniiteHide

Optical Data of StoppaniiteHide

Chemistry of StoppaniiteHide

Crystallography of StoppaniiteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of StoppaniiteHide

Synonyms of StoppaniiteHide

Other Language Names for StoppaniiteHide

Relationship of Stoppaniite to other SpeciesHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for StoppaniiteHide

References for StoppaniiteHide

Localities for StoppaniiteHide

Related Minerals - Strunz-mindat Grouping Hide