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Epididymite

A valid IMA mineral species - grandfathered

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Epididymite

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

Epididymite

Jahren Feldspar Quarry, Jahren pegmatite, Stavern, Larvik Commune, Vestfold, Norway

Epididymite

Narssârssuk pegmatite, Narsaarsuk Plateau, Igaliku, Kujalleq, Greenland

Epididymite

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

Epididymite

Jahren Feldspar Quarry, Jahren pegmatite, Stavern, Larvik Commune, Vestfold, Norway

Epididymite

Narssârssuk pegmatite, Narsaarsuk Plateau, Igaliku, Kujalleq, Greenland

Epididymite

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

Epididymite

Jahren Feldspar Quarry, Jahren pegmatite, Stavern, Larvik Commune, Vestfold, Norway

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About EpididymiteHide

Formula:

Na₂Be₂Si₆O₁₅ · H₂O

Colour:

Colourless to white, rarely pink

Lustre:

Vitreous

Hardness:

5½

Specific Gravity:

2.548

Crystal System:

Orthorhombic

Name:

Derived from the Greek επ (near), and δίδνμος (twin) referring to the dimorphous relation with eudidymite.

Type Locality:

ⓘ Narssârssuk pegmatite, Narsaarsuk Plateau, Igaliku, Kujalleq, Greenland

Dimorph of:

Eudidymite

A late-stage mineral found in nepheline syenite pegmatites.

Unique IdentifiersHide

Mindat ID:

1388

Long-form identifier:

mindat:1:1:1388:4

IMA Classification of EpididymiteHide

IMA status:

Approved, 'Grandfathered' (first described prior to 1959)

IMA Formula:

Na₂Be₂Si₆O₁₅·H₂O

First published:

1893

Type description reference:

Flink, Gust. (1893) Om några mineral från Grönland. Geologiska Föreningen i Stockholm Förhandlingar, 15 (4) 195-208 doi:10.1080/11035899309442185

Classification of EpididymiteHide

Strunz-mindat (2026):

9.DG.55

9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains

Dana 8th ed.:

66.3.1.4

66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
3 : Amphiboles - Ca-Na subgroup

Hey's CIM Ref.:

14.3.7

14 : Silicates not Containing Aluminum
3 : Silicates of Be

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 for Standard
Edd	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 EpididymiteHide

Lustre:

Vitreous

Transparency:

Transparent, Translucent

Comment:

Pearly on cleavage

Colour:

Colourless to white, rarely pink

Streak:

White

Hardness:

5½ on Mohs scale

Tenacity:

Brittle

Cleavage:

Perfect
Perfect on {001}, good on {010}

Fracture:

Irregular/Uneven, Conchoidal

Density:

2.548 g/cm³ (Measured)

Optical Data of EpididymiteHide

Type:

Biaxial (+)

RI values:

n_α = 1.544 n_β = 1.544 n_γ = 1.546

2V:

Measured: 22°

Max. Birefringence:

δ = 0.002
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Thickness: 30 µm Order divisions

Rotation:

Surface Relief:

None to Very Low
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.

Focus:

In focus

Interference Figure:

This shows the idealized biaxial acute bisectrix (Bxa) interference figure - the conoscopic view for a grain cut perpendicular to the acute bisectrix, using this mineral's 2V. The two small white dots mark the melatopes - the points where the two optic axes emerge - and are shown only when they fall within the field of view. The coloured bands are isochromatics, and the dark bands are isogyres.

Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.

Thickness: 30 µm

Stage rotation: 0°

Dispersion:

weak

Chemistry of EpididymiteHide

Mindat Formula:

Na₂Be₂Si₆O₁₅ · H₂O

Element Weights:

Element	% weight
O	52.187 %
Si	34.354 %
Na	9.374 %
Be	3.675 %
H	0.411 %

Calculated from ideal end-member formula.

Elements listed:

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

Common Impurities:

Al,Fe,Mg,Ca,K

Crystallography of EpididymiteHide

Crystal System:

Orthorhombic

Class (H-M):

mmm(2/m2/m2/m) - Dipyramidal

Space Group:

Pnma

Cell Parameters:

a = 12.7334(4) Å, b = 13.6298(5) Å, c = 7.3467(3) Å

Ratio:

a:b:c = 0.934 : 1 : 0.539

Unit Cell V:

1275.04 Å³

Twinning:

Reticulated twins, trillings, pseudohexagonal trillings

Crystallographic forms of EpididymiteHide

Crystal Atlas:

Image Loading

Click on an icon to view

Epididymite no.5 - {110} - Goldschmidt (1913-1926)

Epididymite no.13 - {011} - Goldschmidt (1913-1926)

Epididymite no.14 - {001} - Goldschmidt (1913-1926)

3d models and HTML5 code kindly provided by www.smorf.nl.

Crystal StructureHide

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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4

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CIF File Best | x | y | z | a | b | c

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

ID	Species	Reference	Year	Locality	Temp (K)
0004614	Epididymite	Gatta G D, Rotiroti N, McIntyre G J, Guastoni A, Nestola F (2008) New insights into the crystal chemistry of epididymite and eudidymite from Malosa, Malawi: A single-crystal neutron diffraction study American Mineralogist 93 1158-1165	2008	Malosa, Malawi	293
0000212	Epididymite	Robinson P D, Fang J H (1970) The crystal structure of epididymite American Mineralogist 55 1541-1549	1970	Narsarsuk, Greenland	293
0012437	Epididymite	Pobedimskaya E A, Belov N V (1959) The crystal structure of epididymite: a new type of infinite silicooxygenous chains Doklady Akademii Nauk SSSR 129 900-903	1959		293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Epididymite'
loop_
_publ_author_name
'Gatta G D'
'Rotiroti N'
'McIntyre G J'
'Guastoni A'
'Nestola F'
_journal_name_full 'American Mineralogist'
_journal_volume 93 
_journal_year 2008
_journal_page_first 1158
_journal_page_last 1165
_publ_section_title
;
 New insights into the crystal chemistry of epididymite and eudidymite
 from Malosa, Malawi: A single-crystal neutron diffraction study
;
_database_code_amcsd 0004614
_chemical_compound_source 'Malosa, Malawi'
_chemical_formula_sum 'Na Be Si3 O8 H'
_cell_length_a 12.7334
_cell_length_b 13.6298
_cell_length_c 7.3467
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1275.047
_exptl_crystal_density_diffrn      2.555
_symmetry_space_group_name_H-M 'P n m a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,z'
  '-x,1/2+y,-z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2-z'
  '1/2+x,y,1/2-z'
  '1/2-x,-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_U_iso_or_equiv
Na   0.10285   0.06934   0.50192   0.02660
Be   0.49472  -0.00042   0.34273   0.00670
Si1   0.15908   0.13780   0.01543   0.00510
Si2   0.34260   0.13635   0.73115   0.00540
Si3   0.33173   0.13741   0.30525   0.00590
O1   0.12005   0.25000   0.00001   0.01390
O2   0.21704   0.12240   0.21004   0.01180
O3   0.06068   0.06612   0.00658   0.00720
O4   0.23777   0.11405   0.84938   0.01480
O5   0.43489   0.06457   0.78946   0.00900
O6   0.37761   0.25000   0.76529   0.01200
O7   0.30497   0.12340   0.52074   0.01060
O8   0.37000   0.25000   0.26883   0.01150
O9   0.41552   0.06300   0.22624   0.00950
OW   0.05713   0.25000   0.48974   0.02880
H1   0.00647   0.25000   0.58561   0.05150
H2   0.01340   0.25000   0.38486   0.05860
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
Na 0.03770 0.02200 0.02010 -0.00740 0.00530 -0.00150
Be 0.00680 0.00680 0.00650 0.00050 0.00020 0.00010
Si1 0.00400 0.00490 0.00620 -0.00080 0.00010 -0.00020
Si2 0.00510 0.00540 0.00590 0.00060 0.00120 -0.00070
Si3 0.00650 0.00550 0.00580 0.00100 -0.00170 -0.00020
O1 0.01360 0.00390 0.02410 0.00000 -0.00310 0.00000
O2 0.00840 0.01620 0.01090 -0.00140 -0.00490 0.00050
O3 0.00680 0.00770 0.00710 -0.00340 -0.00020 -0.00030
O4 0.01080 0.01860 0.01510 -0.00260 0.00780 -0.00210
O5 0.01000 0.00930 0.00760 0.00420 0.00040 -0.00060
O6 0.01330 0.00540 0.01730 0.00000 -0.00320 0.00000
O7 0.01200 0.01310 0.00680 0.00190 -0.00090 -0.00020
O8 0.01240 0.00560 0.01640 0.00000 0.00220 0.00000
O9 0.01130 0.00940 0.00770 0.00450 -0.00130 -0.00060
OW 0.02150 0.03160 0.03330 0.00000 0.00600 0.00000
H1 0.04400 0.05100 0.05900 0.00000 0.02400 0.00000
H2 0.06000 0.06000 0.05500 0.00000 -0.01500 0.00000

Epitaxial Relationships of EpididymiteHide

Epitaxial Minerals:

'Eudidymite'

Na₂Be₂Si₆O₁₅ · H₂O

Epitaxy Comments:

Epitaxial intergrowths of epididymite and eudidymite are common

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
3.37 Å	(10)
3.08 Å	(10)
2.96 Å	(10)
1.790 Å	(6)
1.634 Å	(6)
2.48 Å	(5)'
1.537 Å	(5)

Comments:

From Handbook of Mineralogy, specimen from Narssârssuk, Greenland

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 4a: Earth’s earliest continental crust	>4.4-3.0
19 : Granitic intrusive rocks
Stage 4b: Highly evolved igneous rocks	>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of EpididymiteHide

Type Locality:

ⓘ Narssârssuk pegmatite, Narsaarsuk Plateau, Igaliku, Kujalleq, Greenland

Place of Conservation of Type Material:

No material connected with Flink's first investigation and descriptions has survived.

Chemical Analysis of Type Material:

SiO₂	73.74 %
BeO	10.56 %
Na₂O	12.88 %
H₂O	3.73 %
Total:	100.91 %

Reference:

Flink, Gust. (1893) Om några mineral från Grönland. Geologiska Föreningen i Stockholm Förhandlingar, 15 (4) 195-208 doi:10.1080/11035899309442185

Synonyms of EpididymiteHide

Epidymite

Other Language Names for EpididymiteHide

Dutch:Epididymiet

German:Epididymit
Epidymit

Russian:Эпидидимит

Simplified Chinese:斜方板晶石
斜板晶石
板晶石

Spanish:Epididymita
Epidymita

Traditional Chinese:斜方板晶石
斜板晶石
板晶石

Common AssociatesHide

Associations Based on Photo Data:

106 photos of Epididymite associated with Aegirine	NaFe³⁺Si₂O₆
49 photos of Epididymite associated with Albite	Na(AlSi₃O₈)
38 photos of Epididymite associated with Eudidymite	Na₂Be₂Si₆O₁₅ · H₂O
36 photos of Epididymite associated with Quartz	SiO₂
26 photos of Epididymite associated with Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
25 photos of Epididymite associated with Serandite	NaMn²⁺₂Si₃O₈(OH)
24 photos of Epididymite associated with Catapleiite	Na₂Zr(Si₃O₉) · 2H₂O
21 photos of Epididymite associated with 'Smoky Quartz'	SiO₂
20 photos of Epididymite associated with Microcline	K(AlSi₃O₈)
20 photos of Epididymite associated with Analcime	Na(AlSi₂O₆) · H₂O

Related Minerals - Strunz-mindat Grouping Hide

9.DG.	Barrydawsonite-(Y)	Na_1.5Y_0.5CaSi₃O₈(OH)	Mon. 2/m : P2₁/b
9.DG.	Paratobermorite	Ca₅AlSi₅O₁₆(OH) · 5H₂O	Mon. 2/m
9.DG.	Calcinaksite	KNaCa(Si₄O₁₀) · H₂O	Tric. 1 : P1
9.DG.	Alvesite	NaKZrSi₆O₁₅ · 2H₂O	Orth. mmm(2/m2/m2/m)
9.DG.02	Steedeite	NaMn₂[Si₃BO₉](OH)₂	Tric. 1 : P1
9.DG.02	Nolzeite	NaMn₂[Si₃BO₉](OH)₂ · 2H₂O	Tric. 1 : P1
9.DG.05	Murakamiite	LiCa₂Si₃O₈(OH)	Tric. 1 : P1
9.DG.05	Serandite	NaMn²⁺₂Si₃O₈(OH)	Tric. 1 : P1
9.DG.05	Bustamite	CaMn²⁺(Si₂O₆)	Tric. 1 : P1
9.DG.05	Pectolite	NaCa₂Si₃O₈(OH)	Tric. 1 : P1
9.DG.05	Tanohataite	LiMn₂Si₃O₈(OH)	Tric. 1 : P1
9.DG.05	Dalnegorskite	Ca₅Mn²⁺(Si₃O₉)₂	Tric. 1 : P1
9.DG.05	'Wollastonite-1A'	CaSiO₃	Tric. 1 : P1
9.DG.05	Wollastonite	Ca₃(Si₃O₉)	Tric. 1 : P1
9.DG.05	Ferrobustamite	CaFe²⁺(Si₂O₆)	Tric. 1
9.DG.05	Schizolite	NaCaMnSi₃O₈(OH)	Tric. 1 : P1
9.DG.07	Cascandite	CaScSi₃O₈(OH)	Tric. 1
9.DG.08	Plombièrite	Ca₅Si₆O₁₆(OH)₂ · 7H₂O	Orth.
9.DG.10	Clinotobermorite	Ca₅Si₆O₁₇ · 5H₂O	Mon.
9.DG.10	Riversideite	Ca₅Si₆O₁₆(OH)₂ · 2H₂O	Orth.
9.DG.10	Tobermorite	Ca₅Si₆O₁₇ · 5H₂O	Mon. 2 : P2₁
9.DG.12	Jusite	Na₂Ca₁₅Al₄Si₁₆O₅₄ · 17H₂O
9.DG.12	Kenotobermorite	Ca₄Si₆O₁₅(OH)₂ · 5H₂O	Mon.
9.DG.15	Foshagite	Ca₄(Si₃O₉)(OH)₂	Tric. 1 : P1
9.DG.20	Jennite	Ca₉(Si₃O₉)₂(OH)₈ · 8H₂O	Tric. 1 : P1
9.DG.20	Kamenevite	K₂TiSi₃O₉ · H₂O	Orth. 222 : P2₁2₁2₁
9.DG.25	Paraumbite	K₃Zr₂H(Si₃O₉)₂ · nH₂O	Orth. mm2
9.DG.25	Umbite	K₂(Zr,Ti)Si₃O₉ · H₂O	Orth. 222 : P2₁2₁2₁
9.DG.30	Sørensenite	Na₄SnBe₂Si₆O₁₆(OH)₄	Mon. 2/m : B2/b
9.DG.32	Escheite	Ca₂NaMnTi₅[Si₁₂O₃₄]O₂(OH)₃ · 12H₂O	Orth. mm2 : Ama2
9.DG.35	Xonotlite	Ca₆(Si₆O₁₇)(OH)₂	Mon. 2/m : B2/m
9.DG.40	Hillebrandite	Ca₂(SiO₃)(OH)₂	Orth. mmm(2/m2/m2/m) : Cmcm
9.DG.45	Zorite	Na₈(Ti,Nb)₅(Si₆O₁₇)₂(OH,O)₅ · 14H₂O	Orth.
9.DG.45	Chivruaiite	Ca₄(Ti,Nb)₅(Si₆O₁₇)₂(OH,O)₅ · 13-14H₂O	Orth. mmm(2/m2/m2/m) : Cmmm
9.DG.50	Haineaultite	(Na,Ca)₅Ca(Ti,Nb)₅(Si₆O₁₇)₂(OH,F)₈ · 5H₂O	Orth. 222 : C222
9.DG.60	Eudidymite	Na₂Be₂Si₆O₁₅ · H₂O	Mon. 2/m : B2/b
9.DG.65	Elpidite	Na₂ZrSi₆O₁₅ · 3H₂O	Orth.
9.DG.65	Patynite	NaKCa₄[Si₉O₂₃]	Tric. 1 : P1
9.DG.67	Whelanite	Cu²⁺₂Ca₆[Si₆O₁₇(OH)](CO₃)(OH)₃ · 2H₂O	Orth. mm2 : Pnn2
9.DG.70	Enricofrancoite	KNaCaSi₄O₁₀	Tric. 1 : P1
9.DG.70	Yusupovite	Na₂Zr(Si₆O₁₅) · 2.5H₂O	Mon. 2/m : B2/m
9.DG.70	Litidionite	KNaCuSi₄O₁₀	Tric. 1 : P1
9.DG.70	Fenaksite	(K,Na)₄(Fe,Mn)₂(Si₄O₁₀)₂(OH,F)	Tric. 1 : P1
9.DG.70	Manaksite	KNaMnSi₄O₁₀	Tric. 1 : P1
9.DG.75	Senkevichite	CsKNaCa₂TiO[Si₇O₁₈](OH)	Tric. 1 : P1
9.DG.75	Tinaksite	K₂Na(Ca,Mn²⁺)₂TiO[Si₇O₁₈(OH)]	Tric.
9.DG.75	Tokkoite	K₂Ca₄[Si₇O₁₈(OH)](OH,F)	Tric.
9.DG.80	Fluorcanasite	K₃Na₃Ca₅Si₁₂O₃₀F₄ · H₂O	Mon. m : Bm
9.DG.80	Canasite	K₃Na₃Ca₅Si₁₂O₃₀(OH)₄	Mon. m : Bm
9.DG.85	Miserite	K_1.5-x(Ca,Y,REE)₅(Si₆O₁₅)(Si₂O₇)(OH,F)₂ · yH₂O	Tric.
9.DG.90	Frankamenite	K₃Na₃Ca₅(Si₁₂O₃₀)(F,OH)₄ · H₂O	Tric. 1 : P1
9.DG.92	Charoite	(K,Sr)_15-16(Ca,Na)₃₂[Si₆O₁₁(O,OH)₆]₂[Si₁₂O₁₈(O,OH)₁₂]₂[Si₁₇O₂₅(O,OH)₁₈]₂(OH,F)₄ · ~3H₂O	Mon. 2/m : P2₁/m
9.DG.95	Yuksporite	K₄(Ca,Na)₁₄(Sr,Ba)₂(◻,Mn,Fe)(Ti,Nb)₄(O,OH)₄(Si₆O₁₇)₂(Si₂O₇)₃(H₂O,OH)₃	Mon. 2/m : P2₁/m
9.DG.97	Eveslogite	(Na,K,Ca,Sr,Ba)₄₈ [(Ti,Nb,Mn,Fe²⁺)₁₂Si₄₈O₁₄₄(OH)₁₂](F,OH,Cl)₁₄	Mon. 2/m : P2/m

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 EpididymiteHide

mindat.org URL:

https://www.mindat.org/min-1388.html
Please feel free to link to this page.

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External Links:

Look for Epididymite on Webmineral

Look for Epididymite on Wikipedia

Look for Epididymite on Mineralien Atlas

Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

Mineral Dealers:

Buy from D. Joyce minerals

References for EpididymiteHide

Reference List:

Flink, Gust. (1893) Om några mineral från Grönland. Geologiska Föreningen i Stockholm Förhandlingar, 15 (4) 195-208 doi:10.1080/11035899309442185

Flink, G. (1901) Part I: On the Minerals from Narsarsuk on the Firth of Tunugdliarfik in Southern Greenland. Meddelelser om Grønland, 24. 7-180

Ito, T. (1934) The Structure of Epididymite (HNaBeSi₃O₈). Zeitschrift für Kristallographie - Crystalline Materials, 88 (1) 142-149 doi:10.1524/zkri.1934.88.1.142

Černý, P. (1963) Epididymite and milarite—alteration products of beryl from Věžná, Czechoslovakia. Mineralogical Magazine and Journal of the Mineralogical Society, 33 (261) 450-457 doi:10.1180/minmag.1963.033.261.02

Robinson, Paul D., Fang, J. H. (1970) The crystal structure of epididymite. American Mineralogist, 55 (9-10) 1541-1549

Fang, J. H., Robinson, Paul D., Ohya, Y. (1972) Redetermination of the crystal structure of eudidymite and its dimorphic relationship to epididylnite. American Mineralogist, 57 (9-10) 1345-1354

Petersen, O. V., Medenbach, O., Bollhorn, J. (1997) Epididymite twins Contribution to the mineralogy of Ilímaussaq, No. 99. Neues Jahrbuch für Mineralogie - Monatshefte, 1997 (5) 221-228 doi:10.1127/njmm/1997/1997/221

(2001) Epididymite. Handbook of Mineralogy. Mineralogical Society of America

Petersen, Ole V.; Johnsen, Ole (2005) Mineral species first described from Greenland - Special Publication No. 8. The Canadian Mineralogist. p.184

Gatta, G. D., Rotiroti, N., McIntyre, G.J., Guastoni, A., Nestola, F. (2008) New insights into the crystal chemistry of epididymite and eudidymite from Malosa, Malawi: A single-crystal neutron diffraction study. American Mineralogist, 93 (7) 1158-1165 doi:10.2138/am.2008.2965

Localities for EpididymiteHide

Showing 87 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

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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
Newfoundland and Labrador Labrador ⓘ Seal Lake alkaline complex (Letitia Lake)
Québec Montérégie La Vallée-du-Richelieu RCM Mont Saint-Hilaire ⓘ Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH)	MANDARINO et al. (1965) +4 other references
Lajemmerais RCM Varennes & St-Amable ⓘ Saint-Amable sill	Horváth et al. (1998)
ⓘ Demix-Varennes quarry	Horváth et al. (1998)

Czech Republic
Vysočina Region Žďár nad Sázavou District Věžná ⓘ Věžná I pegmatite	www.cseg.ca/conferences/2000/556.PDF. +2 other references
ⓘ Věžná II pegmatite	Černý (1963) +2 other references

Greenland (TL)
Kujalleq Igaliku Narsaarsuk Plateau ⓘ Narssârssuk pegmatite (TL)	Flink (1893) +2 other references
ⓘ Ilímaussaq complex	Petersen (2001)
ⓘ Mount Nakkaalaaq	Bohse et al. (2001)
ⓘ Taseq Slope	Bohse et al. (2001)

Malawi
Southern Region ⓘ Machinga	Fabre (n.d.)
Zomba ⓘ Mount Malosa	Cairncross et al. (1999) +4 other references

Norway
Akershus Lunner ⓘ Gjerdingselva	Raade et al. (1982)
ⓘ Oslo Volcanic Province	Raade (1972)
Telemark Porsgrunn Auenlandet Sagåsen ⓘ Saga 1 Quarry	Engvoldsen et al. (1991)
ⓘ Sagåsen Quarry	Larsen et al. (2005)
ⓘ Torbjørnsås Quarry	Engvoldsen et al. (1991)
Langangen Kokkersvold - Blåfjell E18 roadcuts ⓘ Blåfjell (E18 roadcuts)	Raade et al. (1983)
ⓘ Chiavennite dike	Raade et al. (1983)
ⓘ Rønningen E 18 roadcuts	Engvoldsen et al. (1991)
Siktesøya ⓘ Brønnebukta	Larsen et al. (1991)
ⓘ Tangane	Larsen et al. (2010)
Slevolden ⓘ E18 roadcuts	Burvald (1993)
Vestfold Larvik Commune Brunlanes ⓘ Bakkane Quarry	Raade et al. (1983)
ⓘ Eikaholmen	Engvoldsen et al. (1991)
Hedrum Lågendalen ⓘ Bratthagen 1	Engvoldsen et al. (1991)
ⓘ Hedrum Quarry	Engvoldsen et al. (1991)
Malerød ⓘ Midtfjellet Quarry	Andresen (2011)
ⓘ Vardåsen Quarry	Berge (1993) +1 other reference
Stavern (Fredriksvärn) Fuglevika ⓘ Fuglevika Feldspar Prospect	Kristiansen (2005)
ⓘ Jahren pegmatite	Larsen (2018)
ⓘ Jahrehagen cottage grounds	Andresen et al. (2018)
ⓘ Jahren Feldspar Quarry (Jaren Feldspar Quarry)	Engvoldsen et al. (1991)
ⓘ RV 301 Helgeroaveien roadcut	Larsen (2021)
Tvedalen ⓘ Almenningen Quarry (Treschow-Fritzøe Quarry)	Engvoldsen et al. (1991)
ⓘ Askedalsbotn Quarry	Larsen et al. (2010)
ⓘ Heia Quarry	Engvoldsen et al. (1991)
ⓘ Johs Nilsens Quarry	Larsen (2016)
ⓘ Norwegian Pearl Quarry	Larsen et al. (2010)
ⓘ Østskogen Quarry	Nordrum (2007)
ⓘ Røyås Quarry	Larsen et al. (2010)
ⓘ Saga Pearl Quarry	Engvoldsen et al. (1991) +1 other reference
ⓘ Tuften	Engvoldsen et al. (1991)
ⓘ A/S Granit Quarry	Nordrum (2008) +1 other reference
ⓘ Vevja Quarry	Larsen et al. (1992) +2 other references
Vesle Arøya ⓘ Eudidymite-Epididymite locality	Flink (1899) +2 other references
Sandefjord Haneholmveien ⓘ Virikkollen	Larsen et al. (2012)
Østerøya ⓘ Eian	Berge et al. (2002)
Vesterøya ⓘ Buer	Berge et al. (2011)
ⓘ Buerskogen	Larsen et al. (2013)
ⓘ Husebyåsen prospect	Engvoldsen et al. (1991) +1 other reference
ⓘ Kariåsen	Engvoldsen et al. (1991)
ⓘ Rambergåsen	Knut Edvard Larsen (2023)
ⓘ Vøra	Berge (1978)

Portugal
Azores São Miguel ⓘ Água de Pau Volcano	Samples collected by Luigi Chiappino ... +1 other reference

Russia
Aldan Shield Chara and Tokko Rivers Confluence ⓘ Murunskii Massif	Konev et al. (1993)
ⓘ Kedrovyi alkaline massif	Konev et al. (1996)
Murmansk Oblast ⓘ Aykuayvenchorr Mt. (Aikuaivenchorr Mt.; Aikuaiventchorr Mt.)	[World of Stones 95:5-6
ⓘ Eveslogchorr Mt	[World of Stones 95:5-6 +2 other references
Astrophyllite Stream ⓘ Pegmatite	Pekov et al. (2005)
ⓘ IGC Stop 4-2	Arzamastsev et al. (2008)
ⓘ Vein No. 3	Men'shikov (2006)
ⓘ Khibinpakhkchorr Mountain	Azarova et al. (2009)
Kovdorsky District ⓘ Kovdor Massif	Mikhailova et al. (2015)
Kukisvumchorr Mt ⓘ Kirovskii apatite mine	Cámara et al. (2013) +1 other reference
252 m level ⓘ Hilairitovoye pegmatite	Pekov (2003)
Lovozersky District ⓘ Alluaiv Mountain	Yakovenchuk et al. (2010)
Umbozero mine ⓘ Shomiokitovoe pegmatite	Pekov et al. (1999) +1 other reference
ⓘ Apuaiv Mountain	Sorokhtina N.V. et al. (2004)
ⓘ Karnasurt Mountain	Pekov (1998) +1 other reference
ⓘ Hackmanite Stock (Pegmatite #62)	Pekov (1998)
ⓘ Natrolite Stock	Pekov (1998) +2 other references
ⓘ Kitknyun Mountain	Ivanyuk et al. (2006)
Kuftnyun Mountain ⓘ Pegmatite No. 19	Pekov (1998)
ⓘ Kuivchorr Mountain	[World of Stones 95:5-6
ⓘ Malyi Punkaruaiv Mountain	Yakovenchuk et al. (2011)
ⓘ Selsurt Mountain	Pekov (2003)
ⓘ Sengischorr Mountain	Tom Loomis specimen +1 other reference
Tuva Sangilen Upland ⓘ Korgeredaba alkaline massif	Kapustin et al. (1965)

Spain
Canary Islands Santa Cruz de Tenerife Province Tenerife ⓘ ~~Alcala~~	Dill et al. (2023)
Granadilla de Abona ⓘ ~~La Mareta~~	Dill et al. (2023)
ⓘ ~~Playa de San Juan~~	Dill et al. (2023)
ⓘ ~~Poris de Abona~~	Dill et al. (2023)
Santiago del Teide ⓘ ~~Puerto de Santiago~~	Dill et al. (2023)

Tajikistan
Districts of Republican Subordination ⓘ Dara-i-Pioz Massif	Pautov (2003)

USA
Massachusetts Norfolk County ⓘ Quincy
New Mexico Otero County Cornudas Mountains ⓘ Wind Mountain	XRD Laszlo Horvath collection specimen

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Epididymite

About EpididymiteHide

Unique IdentifiersHide

IMA Classification of EpididymiteHide

Classification of EpididymiteHide

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Physical Properties of EpididymiteHide

Optical Data of EpididymiteHide

Chemistry of EpididymiteHide

Crystallography of EpididymiteHide

Crystallographic forms of EpididymiteHide

Crystal StructureHide

Epitaxial Relationships of EpididymiteHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of EpididymiteHide

Synonyms of EpididymiteHide

Other Language Names for EpididymiteHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

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References for EpididymiteHide

Localities for EpididymiteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide