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Epidote

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Formula:
{Ca
 
2
}{Al
 
2
Fe
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
System:MonoclinicColour:Yellowish-green, green, ...
Lustre:Vitreous, PearlyHardness:6
Member of:Epidote Group
Name:Named in 1801 by Rene Just Haüy from the Greek επιδοσιζ "Epidosis" = "increase" in allusion to the crystal characteristic of one longer side at the base of the prism.


Epidote Group.
Clinozoisite-Epidote Series. The Al2Fe3+ analogue of Clinozoisite.

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Classification of Epidote

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/C.23-20
Nickel-Strunz 10th (pending) edition ID:9.BG.05a

9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination
Dana 8th edition ID:58.2.1a.7

58 : SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
2 : Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Hey's CIM Ref.:16.21.2

16 : Silicates Containing Aluminum and other Metals
21 : Aluminosilicates of Fe and Ca
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Type Occurrence of Epidote

Type Locality:Bourg d'Oisans, Isère, Rhône-Alpes, France
Year of Discovery:1801

Occurrences of Epidote

Geological Setting:Regional and contact metamorphic rocks. Saussuritization (alteration of plagioclase)

Physical Properties of Epidote

Lustre:Vitreous, Pearly
Diaphaneity (Transparency):Transparent, Opaque
Colour:Yellowish-green, green, brownish-green, black
Streak:Colorless
Hardness (Mohs):6
Tenacity:Brittle
Cleavage:Perfect
Perfect on {001}, imperfect on {100}
Fracture:Irregular/Uneven
Density (measured):3.38 - 3.49 g/cm3
Density (calculated):3.43(3) g/cm3

Crystallography of Epidote

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/m {P1 1 21/m} {P21/m} {P1 21/m 1}
Cell Parameters:a = 8.8877(14) Å, b = 5.6275(8) Å, c = 10.1517(12) Å
β = 115.383(14)°
Ratio:a:b:c = 1.579 : 1 : 1.804
Unit Cell Volume:V 458.73 ų (Calculated from Unit Cell)
Z:2
Morphology:Crystals prismatic to 35 cm. Fibrous, coarse to fine granular, massive.
Twinning:On {100}, contact, lamellar, common.
Crystal Atlas:
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Epidote no.9 - Goldschmidt (1913-1926)
Epidote no.94 - Goldschmidt (1913-1926)

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The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. The 3d models and HTML5 code are kindly provided by www.smorf.nl.

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Structure
  Reference
Gabe E J Portheine J C Whitlow S H (1973) A reinvestigation of the epidote structure: Confirmation of the iron location sample LEP. American Mineralogist 58:218-223.

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More Crystal Structures
Click here to view more crystal structures at the American Mineralogist Crystal Structure Database
X-Ray Powder Diffraction:
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Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Epidote

Type:Biaxial (-)
RI values: nα = 1.715 - 1.751 nβ = 1.725 - 1.784 nγ = 1.734 - 1.797
2V:Measured: 90° to 116°, Calculated: 62° to 84°
Maximum Birefringence:δ = 0.019 - 0.046

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:strong r > v
Pleochroism:Strong
Comments:X= colorless, pale yellow, pale green
Y= greenish yellow
Z= yellowish green

Chemical Properties of Epidote

Formula:
{Ca
 
2
}{Al
 
2
Fe
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Simplified for copy/paste:{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Essential elements:Al, Ca, Fe, H, O, Si
All elements listed in formula:Al, Ca, Fe, H, O, Si
Common Impurities:Al,Mg,Mn

Relationship of Epidote to other Species

Series:Forms a series with Clinozoisite (see here)
Member of:Epidote Group
Other Members of Group:

- +
Allanite-(Ce)
{CaCe}{Al
 
2
Fe
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Allanite-(La)
{CaLa}{Al
 
2
Fe
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Allanite-(Nd)
{CaNd}{Al
 
2
Fe
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Allanite-(Y)
{CaY}{Al
 
2
Fe
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Åskagenite-(Nd)
{Mn
2+
 
Nd}{Al
 
2
Fe
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O
 
2
Clinozoisite
{Ca
 
2
}{Al
 
3
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Clinozoisite-(Sr)
{CaSr}{Al
 
3
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Dissakisite-(Ce)
{CaCe}{Al
 
2
Mg}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Dissakisite-(La)
{CaLa}{Al
 
2
Mg}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Dollaseite-(Ce)
{CaCe}{MgAlMg}(Si
 
2
O
 
7
)(SiO
 
4
)(OH)F
Epidote-(Pb)
{CaPb}{Al
 
2
Fe
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Epidote-(Sr)
{CaSr}{Al
 
2
Fe
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Ferriallanite-(Ce)
{CaCe}{Fe
3+
 
AlFe
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Ferriallanite-(La)
{CaLa}{Fe
3+
 
AlFe
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Hancockite
{CaPb}{Al
 
2
(Fe
3+
 
,Mn
3+
 
)}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Khristovite-(Ce)
{CaCe}{MgAlMn
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)(OH)F
Manganiandrosite-(Ce)
{(Mn
2+
 
,Ca)(Ce,REE)}{Mn
3+
 
AlMn
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Manganiandrosite-(La)
{Mn
2+
 
La}{Mn
3+
 
AlMn
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Manganipiemontite-(Sr)
{CaSr}{Mn
3+
 
AlMn
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Mukhinite
{Ca
 
2
}{Al
 
2
V
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Piemontite
{Ca
 
2
}{Al
 
2
Mn
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Piemontite-(Pb)
CaPbAl
 
2
Mn
3+
 
[Si
 
2
O
 
7
][SiO
 
4
]O(OH)
Piemontite-(Sr)
{CaSr}{Al
 
2
Mn
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Uedaite-(Ce)
{Mn
2+
 
Ce}{Al
 
2
Fe
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Unnamed (Ca-analogue of Manganiandrosite-(La))
{(Ca,(La,REE),Mn
2+
 
)
 
2
}{(Mn
3+
 
,Fe
3+
 
,Al)Al(Mn
2+
 
,Mg)}(Si
 
2
O
 
7
)((Si,Al,As)O
 
4
)O(OH)
Unnamed (Mg-analogue of Ferriallanite-(Ce))
{CaCe}{(Fe
3+
 
,Al)Al(Mg,Fe
2+
 
)}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Unnamed (Mn-analogue of Ferriallanite-(Ce))
{CaCe}{Fe
3+
 
AlMn
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Vanadoallanite-(La)
{CaLa}{V
3+
 
AlFe
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Vanadoandrosite-(Ce)
{Mn
2+
 
Ce}{V
3+
 
AlMn
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Zoisite
{Ca
 
2
}{Al
 
3
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
Related Minerals - Nickel-Strunz Grouping):

- +
9.BG.05bAllanite-(Ce)
{CaCe}{Al
 
2
Fe
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05bAllanite-(La)
{CaLa}{Al
 
2
Fe
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05bAllanite-(Y)
{CaY}{Al
 
2
Fe
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05aClinozoisite
{Ca
 
2
}{Al
 
3
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05bDissakisite-(Ce)
{CaCe}{Al
 
2
Mg}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05Dollaseite-(Ce)
{CaCe}{MgAlMg}(Si
 
2
O
 
7
)(SiO
 
4
)(OH)F
9.BG.05Epidote-(Pb)
{CaPb}{Al
 
2
Fe
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05Khristovite-(Ce)
{CaCe}{MgAlMn
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)(OH)F
9.BG.05Mukhinite
{Ca
 
2
}{Al
 
2
V
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05Piemontite
{Ca
 
2
}{Al
 
2
Mn
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05Piemontite-(Sr)
{CaSr}{Al
 
2
Mn
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05bManganiandrosite-(La)
{Mn
2+
 
La}{Mn
3+
 
AlMn
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05Tawmawite
{Ca
 
2
}{(Al,Fe
3+
 
,Cr)
 
3
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05Manganipiemontite-(Sr)
{CaSr}{Mn
3+
 
AlMn
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05bFerriallanite-(Ce)
{CaCe}{Fe
3+
 
AlFe
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05Clinozoisite-(Sr)
{CaSr}{Al
 
3
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05Manganiandrosite-(Ce)
{(Mn
2+
 
,Ca)(Ce,REE)}{Mn
3+
 
AlMn
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05Dissakisite-(La)
{CaLa}{Al
 
2
Mg}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05Vanadoandrosite-(Ce)
{Mn
2+
 
Ce}{V
3+
 
AlMn
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05Uedaite-(Ce)
{Mn
2+
 
Ce}{Al
 
2
Fe
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05Epidote-(Sr)
{CaSr}{Al
 
2
Fe
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05bAllanite-(Nd)
{CaNd}{Al
 
2
Fe
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05bFerriallanite-(La)
{CaLa}{Fe
3+
 
AlFe
2+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.05bÅskagenite-(Nd)
{Mn
2+
 
Nd}{Al
 
2
Fe
3+
 
}(Si
 
2
O
 
7
)(SiO
 
4
)O
 
2
9.BG.10Zoisite
{Ca
 
2
}{Al
 
3
}(Si
 
2
O
 
7
)(SiO
 
4
)O(OH)
9.BG.15Macfallite
Ca
 
2
(Mn
3+
 
,Al)
 
3
(Si
 
2
O
 
7
)(SiO
 
4
)(OH)
 
3
9.BG.15Sursassite
Mn
2+
2
Al
 
3
(Si
 
2
O
 
7
)(SiO
 
4
)(OH)
 
3
9.BG.20Julgoldite-(Fe2+)
Ca
 
2
(Fe
2+
 
,Mg)(Fe
3+
 
,Al)
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)(OH)
 
2
· H
 
2
O
9.BG.20Okhotskite
Ca
 
2
(Mn
2+
 
,Mg)(Mn
3+
 
,Al,Fe
3+
 
)
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)(OH)
 
2
· H
 
2
O
9.BG.20Pumpellyite-(Fe2+)
Ca
 
2
Fe
2+
 
Al
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)(OH)
 
2
· H
 
2
O
9.BG.20Pumpellyite-(Fe3+)
Ca
 
2
(Fe
3+
 
,Mg,Fe
2+
 
)(Al,Fe
3+
 
)
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)(OH,O)
 
2
· H
 
2
O
9.BG.20Pumpellyite-(Mg)
Ca
 
2
MgAl
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)(OH)
 
2
· H
 
2
O
9.BG.20Pumpellyite-(Mn2+)
Ca
 
2
(Mn
2+
 
,Mg)(Al,Mn
3+
 
,Fe
3+
 
)
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)(OH)
 
2
· H
 
2
O
9.BG.20Shuiskite
Ca
 
2
(Mg,Al)(Cr,Al)
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)(OH)
 
2
· 2H
 
2
O
9.BG.20Julgoldite-(Fe3+)
Ca
 
2
(Fe
3+
 
,Mg)(Fe
3+
 
,Al)
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)(OH,O)
 
2
· H
 
2
O
9.BG.20Pumpellyite-(Al)
Ca
 
2
(Al,Fe
2+
 
,Mg)Al
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)(OH,O)
 
2
· H
 
2
O
9.BG.20Poppiite
Ca
 
2
(V
3+
 
,Fe
3+
 
,Mg)(V
3+
 
,Al)
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)(OH,O)
 
2
· H
 
2
O
9.BG.20Julgoldite-(Mg)
Ca
 
2
(Mg,Fe
2+
 
)(Fe
3+
 
,Al)
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)(OH)
 
2
· H
 
2
O
9.BG.25Ganomalite
Pb
 
9
Ca
 
5
Mn(Si
 
2
O
 
7
)
 
4
(SiO
 
4
)O
9.BG.30Rustumite
Ca
 
10
(Si
 
2
O
 
7
)
 
2
(SiO
 
4
)(OH)
 
2
Cl
 
2
9.BG.35Vesuvianite
(Ca,Na,☐)
 
19
(Al,Mg,Fe
3+
 
)
 
13
(☐,B,Al,Fe
3+
 
)
 
5
(Si
 
2
O
 
7
)
 
4
(SiO
 
4
)
 
10
(OH,F,O)
 
10
9.BG.35Wiluite
Ca
 
19
(Al,Mg)
 
13
(B,☐,Al)
 
5
(Si
 
2
O
 
7
)
 
4
(SiO
 
4
)
 
10
(O,OH)
 
10
9.BG.35Manganvesuvianite
Ca
 
19
Mn
3+
 
(Al,Mn
3+
 
,Fe
3+
 
)
 
10
(Mg,Mn
2+
 
)
 
2
(Si
 
2
O
 
7
)
 
4
(SiO
 
4
)
 
10
O(OH)
 
9
9.BG.35Fluorvesuvianite
Ca
 
19
(Al,Mg,Fe
2+
 
)
 
13
(Si
 
2
O
 
7
)
 
4
(SiO
 
4
)
 
10
O(F,OH)
 
9
9.BG.40Vyuntspakhkite-(Y)
(Y,Yb)
 
4
Al
 
2.5-1.5
(Si,Al)
 
1.5-2.5
(SiO
 
4
)
 
4
O(OH)
 
7
9.BG.45Dellaite
Ca
 
6
(Si
 
2
O
 
7
)(SiO
 
4
)(OH)
 
2
9.BG.50Gatelite-(Ce)
CaCe
 
3
Al
 
2
(Al,Mg)(Mg,Fe
2+
 
,Al)(Si
 
2
O
 
7
)(SiO
 
4
)
 
3
(O,F)(OH,O)
 
2
9.BG.55Västmanlandite-(Ce)
Ca(Ce,La)
 
3
Al
 
2
Mg
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)
 
3
(OH)
 
2
F
Related Minerals - Hey's Index Grouping:

- +
16.21.1Esseneite
CaFe
3+
 
[AlSiO
 
6
]
16.21.3Ferro-tschermakite
☐{Ca
 
2
}{Fe
2+
3
Al
 
2
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
16.21.4Ferro-aluminotschermakite
☐{Ca
 
2
}{Fe
2+
3
Al
 
2
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
16.21.5Ferri-tschermakite
☐{Ca
 
2
}{Mg
 
3
Fe
3+
2
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
16.21.6Ferro-Ferri-tschermakite
☐{Ca
 
2
}{Fe
2+
3
Fe
3+
2
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
16.21.7Alumino-ferro-hornblende
☐{Ca
 
2
}{Fe
2+
4
Al}(AlSi
 
7
O
 
22
)(OH)
 
2
16.21.8Pumpellyite-(Fe2+)
Ca
 
2
Fe
2+
 
Al
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)(OH)
 
2
· H
 
2
O
16.21.8Pumpellyite-(Fe3+)
Ca
 
2
(Fe
3+
 
,Mg,Fe
2+
 
)(Al,Fe
3+
 
)
 
2
(Si
 
2
O
 
7
)(SiO
 
4
)(OH,O)
 
2
· H
 
2
O

Other Names for Epidote

Synonyms:
AcanthiconeAcanticoniteAchmatiteAescheriteAkanthicone
AkanthikoneAllochiteArendaliteArenditeBucklandite (of Hermann)
DelphiniteEpidosyteEpidotiteEscheriteFerriepidote
FerriepidotoIron EpidoteOisanite (of de Saussure)PistacitePistazite
PosstrevoritePuschkinitePushkiniteScorzaSelphinite
Strahslstein (of Werner)Thallite
Other Languages:
Croatian:Epidot
Dutch:Epidoot
Finnish:Epidootti
French:Épidote
German:Epidot
Acanthikon
Acanticonit
Acantikonit
Achmatit
Aescherit
Allochit
Arendalit
Arendit
Eisenepidot
Epidotit
Escherit
Pistacit
Posstrevorit
Puschkinit
Pushkinit
Selphinit
Thallit
Hebrew:אפידוט
Hungarian:Epidot
Italian:Epidoto
Japanese:緑簾石
Lithuanian:Epidotas
Polish:Epidot
Portuguese:Epídoto
Romanian:Epidot
Russian:Эпидот
Simplified Chinese:绿帘石
Slovak:Epidot
Spanish:Epidota
Acanticonita
Achmatita
Aescherita
Allochita
Arendalita
Arendita
Epidotita
Escherita
Pistacita
Posstrevorita
Puschkinita
Pushkinita
Selphinita
Thallita
Swedish:Epidot
Traditional Chinese:綠簾石
Ukrainian:Епідот
Varieties:
Allanite-EpidoteBeryllian EpidoteChrome-PistaziteRosstrevoriteTawmawite
WithamiteYttroepidote

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Epidote

Reference List:

- +
Dana, E.S. (1892) Dana's system of mineralogy, 6th. edition. New York: 516-521.

Gottardi G. (1954)- Dati ed osservazioni sulla struttura dell'epidoto. Periodico di Mineralogia – Roma pp. 245-250.

Seki, Y. (1959) Relation between chemical composition and lattice constants of epidote. American Mineralogist: 44: 720-730.

Chatterjee, N.D. (1962) Vesuvianite-epidote paragenesis as a product of greenschist facies of regional metamorphism in the Western Alps. Beiträge zur Mineralogie und Petrographie: 8: 432-439.

Keith, T.E.C., L.J.P. Muffler & M. Cremer (1968), Hydrothermal epidote formed in the Salton Sea geothermal system, California: American Mineralogist: 53: 1635-1644.

Dollase, W.A. (1971), Refinement of the crystal structures of epidote, allanite and hancockite: American Mineralogist: 56: 447-464.

Gabe, E.J., J.C. Portheine, and S.H. Whitlow (1973) A reinvestigation of the epidote structure: confirmation of the iron location. American Mineralogist: 58: 218-223.

Sakai, C., Higashino, T., and Enami, M. (1984) REE-bearing epidote from Sanbagawa pelitic schists, central Shikoku, Japan. Geochem. Journal: 18: 45-53.

Deer, W.A., R.A. Howie, and J. Zussman (1986) Rock-forming minerals, (2nd edition), v. 1B, disilicates and ring silicates: 44: 134.

Kvick, Å, J.J. Pluth, J.W. Richardson, Jr., and J.V. Smith (1988) The ferric iron distribution and hydrogen bonding in epidote: a neutron diffraction study at 15 K. Acta Cryst.: 44: 351-355.

Holland, T.J.B., Redfern, S.A.T., and Pawley, A.R. (1996), Volume behavior of hydrous minerals at high pressure and temperature: II. Compressibilities of lawsonite, zoisite, clinozoisite and epidote. American Mineralogist: 81: 341-348.

Gieré, R. and Sorensen, S.S. (2004) Allanite and other REE-rich epidote-group minerals. In: Epidotes (A. Liebscher & G. Franz, editors). Rev. Mineral. Geochem.: 56: 431-493.

Armbruster, T., Bonazzi, P., Akasaka, M., Bermanec, V., Chopin, C., Gieré R., Heuss-Assbichler, S., Liebscher, A., Menchetti, S., Pan, Y., Pasero, M. (2006): Recommended nomenclature of epidote-group minerals. European Journal of Mineralogy, 18, 551-567.

Mindat.org articles about Epidote

Article entries:
Epidote from the Zard Mountains, Kharan, Balochistan, PakistanMichael Brownfield

Best Localities for Epidote

Best of Species:Epidote

Internet Links for Epidote

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Epidote details from Handbook of Mineralogy (PDF)
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    Localities for Epidote

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