Niigataite

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Formula:

{CaSr}{Al₃}(Si₂O₇)(SiO₄)O(OH)

Colour:

pale grey to yellowish green

Lustre:

Vitreous

Hardness:

5 - 5½

Specific Gravity:

3.63 (Calculated)

Crystal System:

Monoclinic

Member of:

Epidote Group > Epidote Supergroup

Name:

Named for Niigata prefecture, where the type locality is.

Type Locality:

ⓘ Miyabana beach, Ōmi, Itoigawa City, Niigata Prefecture, Japan

Clinozoisite Subgroup of the Epidote Group. Originally known as niigataite; renamed "Clinozoisite-(Sr)" by the Epidote Subcommittee of the CNMMN in 2006; reverted to Niigataite in 2015.

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Classification of NiigataiteHide

IMA status:

Approved

Approval year:

2001

Strunz 8th ed.:

8/C.23-35

Nickel-Strunz 10th (pending) ed.:

9.BG.05

9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO₄ and Si₂O₇ groups; cations in octahedral [6] and greater coordination

Physical Properties of NiigataiteHide

Lustre:

Vitreous

Transparency:

Translucent

Colour:

pale grey to yellowish green

Streak:

white

Hardness:

5 - 5½ on Mohs scale

Hardness Data:

Measured

Tenacity:

Brittle

Cleavage:

Perfect
on {001}

Density:

3.63 g/cm³ (Calculated)

Chemical Properties of NiigataiteHide

Formula:

{CaSr}{Al₃}(Si₂O₇)(SiO₄)O(OH)

IMA Formula:

CaSrAl₃[Si₂O₇][SiO₄]O(OH)

Elements listed:

Al, Ca, H, O, Si, Sr - search for minerals with similar chemistry

Common Impurities:

Crystallography of NiigataiteHide

Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 8.89 Å, b = 5.588 Å, c = 10.21 Å
β = 115.12°

Ratio:

a:b:c = 1.591 : 1 : 1.827

Unit Cell V:

459.23 Å³ (Calculated from Unit Cell)

Morphology:

anhedral grains

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
2.90 Å	(100)
2.79 Å	(50)
2.70 Å	(25)

Type Occurrence of NiigataiteHide

Type Locality:

ⓘ Miyabana beach, Ōmi, Itoigawa City, Niigata Prefecture, Japan

General Appearance of Type Material:

Micro anhedral grains to 0.5 mm across, intimately intergrown with clinozoisite, diaspore and chlorite.

Place of Conservation of Type Material:

Fossa Magna Museum

Geological Setting of Type Material:

Prehnite-rich rodingite block derived from serpentinite melange. Unlike the other Sr-bearing silicates from this district, niigataite has not been found in the jadeitite boulders.

Associated Minerals at Type Locality:

Synonyms of NiigataiteHide

Clinozoisite-(Sr)

IMA2001-055

Other Language Names for NiigataiteHide

German:Niigatait

Japanese:新潟石

Russian:Клиноцоизит-(Sr)

Simplified Chinese:锶斜黝帘石

Spanish:Niigataita

Traditional Chinese:鍶斜黝簾石

Relationship of Niigataite to other SpeciesHide

Member of:

Epidote Group > Epidote Supergroup

Other Members of this group:

Clinozoisite	{Ca₂}{Al₃}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
Epidote	{Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
Epidote-(Sr)	{CaSr}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
Hancockite	{CaPb}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)	Mon.
Mukhinite	{Ca₂}{Al₂V³⁺}(Si₂O₇)(SiO₄)O(OH)	Mon.
Piemontite	{Ca₂}{Al₂Mn³⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
Piemontite-(Pb)	{CaPb}{Al₂Mn³⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
Piemontite-(Sr)	{CaSr}{Al₂Mn³⁺}(Si₂O₇)(SiO₄)O(OH)	Mon.
Tweddillite	{CaSr}{Mn³⁺AlMn³⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
Unnamed (Fe3+ analogue of Piemontite-(Pb))	{CaPb}{Fe³⁺AlMn³⁺}(Si₂O₇)(SiO₄)O(OH)
Unnamed (Fe3+-analogue of Piemontite)	{CaCa}{Fe³⁺AlMn³⁺}(Si₂O₇)(SiO₄)(OH,O)₂
Unnamed (Fe3+-analogue of Piemontite-(Sr))	{CaSr}{Fe³⁺AlMn³⁺}(Si₂O₇)(SiO₄)O(OH)
Unnamed (Ga-dominant member of the epidote group)	{Ca₂}{Al₂(Ga,Fe)}(Si₂O₇)(SiO₄)O(OH)

Related Minerals - Nickel-Strunz Grouping Hide

9.BG.	Shuiskite-(Cr)	Ca₂Cr³⁺Cr³⁺₂[Si₂O₆OH][SiO₄](OH)₂O	Mon. 2/m : B2/m
9.BG.	Alnaperbøeite-(Ce)	Ca(Ce_2.5Na_0.5)(AlAl₂Al)[Si₂O₇][SiO₄]₃O(OH)₂	Mon. 2/m : P2₁/m
9.BG.	Magnesiovesuvianite	Ca₁₉MgAl₄(Al₆Mg₂)(◻₄)◻[Si₂O₇]₄[(SiO₄)₁₀](OH)(OH)₉	Tet. 4/m : P4/n
9.BG.	Alumovesuvianite	Ca₁₉AlAl₄(Al₆Mg₂)(◻₄)◻[Si₂O₇]₄[(SiO₄)₁₀]O(OH)₉	Tet. 4/m : P4/n
9.BG.05b	Allanite-(Ce)	{CaCe}{Al₂Fe²⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
9.BG.05b	Allanite-(La)	{CaLa}{Al₂Fe²⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
9.BG.05b	Allanite-(Y)	{CaY}{Al₂Fe²⁺}(Si₂O₇)(SiO₄)O(OH)	Mon.
9.BG.05a	Clinozoisite	{Ca₂}{Al₃}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
9.BG.05b	Dissakisite-(Ce)	{CaCe}{Al₂Mg}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
9.BG.05	Dollaseite-(Ce)	{CaCe}{MgAlMg}(Si₂O₇)(SiO₄)F(OH)	Mon. 2/m : P2₁/m
9.BG.05a	Epidote	{Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
9.BG.05a	Hancockite	{CaPb}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)	Mon.
9.BG.05	Khristovite-(Ce)	{CaCe}{MgAlMn²⁺}(Si₂O₇)(SiO₄)F(OH)	Mon. 2/m : P2₁/m
9.BG.05a	Mukhinite	{Ca₂}{Al₂V³⁺}(Si₂O₇)(SiO₄)O(OH)	Mon.
9.BG.05a	Piemontite	{Ca₂}{Al₂Mn³⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
9.BG.05	Piemontite-(Sr)	{CaSr}{Al₂Mn³⁺}(Si₂O₇)(SiO₄)O(OH)	Mon.
9.BG.05b	Manganiandrosite-(La)	{Mn²⁺La}{Mn³⁺AlMn²⁺}(Si₂O₇)(SiO₄)O(OH)	Mon.
9.BG.05	Tawmawite	{Ca₂}{(Al,Fe³⁺,Cr)₃}(Si₂O₇)(SiO₄)O(OH)
9.BG.05	Tweddillite	{CaSr}{Mn³⁺AlMn³⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
9.BG.05b	Ferriallanite-(Ce)	{CaCe}{Fe³⁺AlFe²⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
9.BG.05	Manganiandrosite-(Ce)	{Mn²⁺Ce}{Mn³⁺AlMn²⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
9.BG.05	Dissakisite-(La)	{CaLa}{Al₂Mg}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
9.BG.05	Vanadoandrosite-(Ce)	{Mn²⁺Ce}{V³⁺AlMn²⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
9.BG.05	Uedaite-(Ce)	{Mn²⁺Ce}{Al₂Fe²⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
9.BG.05a	Epidote-(Sr)	{CaSr}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
9.BG.05b	Allanite-(Nd)	{CaNd}{Al₂Fe²⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
9.BG.05b	Ferriallanite-(La)	{CaLa}{Fe³⁺AlFe²⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
9.BG.05b	Åskagenite-(Nd)	{Mn²⁺Nd}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O₂	Mon. 2/m : P2₁/m
9.BG.9.BG.	Ferriakasakaite-(La)	{CaLa}{Fe³⁺AlMn²⁺}(Si₂O₇)(SiO₄)O(OH)	Mon. 2/m : P2₁/m
9.BG.9.BG.	Ferriandrosite-(Ce)	{Mn²⁺Ce}{Fe³⁺AlMn²⁺}(SiO₄)(Si₂O₇)O(OH)
9.BG.9.BG	Ferriperbøeite-(Ce)	CaCe₃(Fe³⁺Al₂Fe²⁺)[Si₂O₇][SiO₄]₃O(OH)₂	Mon. 2/m : P2₁/m
9.BG.10	Zoisite	Ca₂Al₃[Si₂O₇][SiO₄]O(OH)	Orth. mmm (2/m 2/m 2/m) : Pnma
9.BG.15	Macfallite	Ca₂Mn³⁺₃(SiO₄)(Si₂O₇)(OH)₃	Mon.
9.BG.15	Sursassite	Mn²⁺₂Al₃(SiO₄)(Si₂O₇)(OH)₃	Mon. 2/m : P2₁/m
9.BG.20	Julgoldite-(Fe2+)	Ca₂Fe²⁺Fe³⁺₂[Si₂O₆OH][SiO₄](OH)₂(OH)	Mon.
9.BG.20	Okhotskite	Ca₂Mn²⁺Mn³⁺₂[Si₂O₆OH][SiO₄](OH)₂(OH)	Mon.
9.BG.20	Pumpellyite-(Fe2+)	Ca₂Fe²⁺Al₂[Si₂O₆OH][SiO₄](OH)₂(OH)	Mon.
9.BG.20	Pumpellyite-(Fe3+)	Ca₂Fe³⁺Al₂[Si₂O₆OH][SiO₄](OH)₂O	Mon.
9.BG.20	Pumpellyite-(Mg)	Ca₂MgAl₂[Si₂O₆OH][SiO₄](OH)₂(OH)	Mon.
9.BG.20	Pumpellyite-(Mn2+)	Ca₂Mn²⁺Al₂[Si₂O₆OH][SiO₄](OH)₂(OH)	Mon.
9.BG.20	Shuiskite-(Mg)	Ca₂MgCr³⁺₂[Si₂O₆OH][SiO₄](OH)₂(OH)	Mon.
9.BG.20	Julgoldite-(Fe3+)	Ca₂Fe³⁺Fe³⁺₂[Si₂O₆OH][SiO₄](OH)₂O	Mon.
9.BG.20	Pumpellyite-(Al)	Ca₂AlAl₂[Si₂O₆OH][SiO₄](OH)₂O	Mon.
9.BG.20	Poppiite	Ca₂V³⁺V³⁺₂[Si₂O₆OH][SiO₄](OH)₂O	Mon. 2/m : B2/m
9.BG.20	Julgoldite-(Mg)	Ca₂MgFe³⁺₂[Si₂O₆OH][SiO₄](OH)₂(OH)	Mon.
9.BG.25	Ganomalite	Pb₉Ca₅Mn(Si₂O₇)₄(SiO₄)O	Hex.
9.BG.30	Rustumite	Ca₁₀(Si₂O₇)₂(SiO₄)(OH)₂Cl₂	Mon.
9.BG.35	Vesuvianite	Ca₁₉Fe³⁺Al₄(Al₆Mg₂)(◻₄)◻[Si₂O₇]₄[(SiO₄)₁₀]O(OH)₉	Tet. 4/mmm (4/m 2/m 2/m) : P4/nnc
9.BG.35	Wiluite	Ca₁₉MgAl₄(Al,Mg)₈(B,◻)₄◻[Si₂O₇]₄[(SiO₄)₁₀]O(O,OH)₉	Tet. 4/mmm (4/m 2/m 2/m) : P4/nnc
9.BG.35	Manganvesuvianite	Ca₁₉Mn³⁺Al₄(Al₆Mg₂)(◻₄)◻[Si₂O₇]₄[(SiO₄)₁₀]O(OH)₉	Tet. 4/m : P4/n
9.BG.35	Fluorvesuvianite	Ca₁₉Fe³⁺Al₄(Al₆Mg₂)(◻₄)◻[Si₂O₇]₄[(SiO₄)₁₀]O(F,OH)₉	Tet. 4/mmm (4/m 2/m 2/m)
9.BG.35	Cyprine	Ca₁₉Cu²⁺Al₄(Al₆Mg₂)(◻₄)◻[Si₂O₇]₄[(SiO₄)₁₀](OH)(OH)₉	Tet. 4/m : P4/n
9.BG.40	Vyuntspakhkite-(Y)	(Y,Yb)₄Al_2.5-1.5(Si,Al)_1.5-2.5(SiO₄)₄O(OH)₇	Mon.
9.BG.45	Dellaite	Ca₆Si₃O₁₁(OH)₂	Tric.
9.BG.50	Gatelite-(Ce)	CaCe₃(AlAl₂Mg)[Si₂O₇][SiO₄]₃O(OH)₂	Mon. 2/m : P2₁/b
9.BG.55	Västmanlandite-(Ce)	CaCe₃(MgAl₂Mg)[Si₂O₇][SiO₄]₃F(OH)₂	Mon. 2/m : P2₁/m

Fluorescence of NiigataiteHide

In UV light:

none

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.

References for NiigataiteHide

Reference List:

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)

H. Miyajima, S. Matsubara, R. Miyawaki, K. Hirokawa (2003): Niigataite, CaSrAl3(Si2O7)(SiO4)O(OH): Sr-analogue of clinozoisite, a new member of the epidote group from the Itoigawa-Ohmi district, Niigata Prefecture, central Japan. Journal of Mineralogy and Petrology Science, 98, 118-129.

American Mineralogist (2004): 89: 469. [Abstract].

www2.ocn.ne.jp/~miyajima/niigataite

www.city.itoigawa.niigata.jp/fmm

Revheim, O. & King, V.T. (2016): Epidote supergroup nomenclature: The names hancockite, niigataite and tweddillite reinstated. Mineralogical Magazine, 80, 877-880

Internet Links for NiigataiteHide

mindat.org URL:

https://www.mindat.org/min-11460.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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Localities for NiigataiteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.


Japan
Niigata Prefecture ⓘ Itoigawa City	www-jm.eps.s.u-tokyo.ac.jp/2002cd-rom/pdf/j038/j038-003_e.pdf.; Miyajima H (2014) Jadeitite from Itoigawa, Niigata Prefecture, central Japan. 21 st meeting of the International Mineralogical Association. p 200
Ōmi ⓘ Miyabana beach (TL)	Miyajima et al. (2003) Journal of Mineralogical and Petrological Sciences, 98, 118-129.
Tottori Prefecture Yazu district ⓘ Wakasa	Norimasa SHIMOBAYASHI (2004) Sr-bearing silicate minerals -itoigawaite and niigataite- in jadeitites and the related rocks from Wakasa district, Tottori Prefecture, Japan. Abstracts for the Meeting (2004) of the Mineralogical Society of Japan, k08-03

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