Niigataite
A valid IMA mineral species
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Formula:
(CaSr)(AlAlAl)O[Si2O7][SiO4](OH)
Colour:
Pale grey to yellowish green
Lustre:
Vitreous
Hardness:
5 - 5½
Specific Gravity:
3.63 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
Named for Niigata prefecture, Japan, that includes the type locality.
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.
Unique Identifiers
Mindat ID:
11460
Long-form identifier:
mindat:1:1:11460:0
GUID
(UUID V4):
(UUID V4):
34eb43e0-fb4a-40d6-a8a2-b64656be1167
IMA Classification of Niigataite
Approved
IMA Formula:
CaSrAl3[Si2O7][SiO4]O(OH)
Approval year:
2001
First published:
2003
Type description reference:
Miyajima, Hiroshi, Matsubara, Satoshi, Miyawaki, Ritsuro, Hirokawa, Kazuo (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 Mineralogical and Petrological Sciences, 98 (3) 118-129 doi:10.2465/jmps.98.118
Classification of Niigataite
9.BG.05
9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination
9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Nii | 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 Niigataite
Vitreous
Transparency:
Transparent
Colour:
Pale grey to yellowish green
Streak:
White
Hardness:
5 - 5½ on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Perfect
on {001}
on {001}
Density:
3.63 g/cm3 (Calculated)
Optical Data of Niigataite
Type:
Biaxial
Comments:
1.67 < n <1.725, anomalous violet interference color.
Chemistry of Niigataite
Mindat Formula:
(CaSr)(AlAlAl)O[Si2O7][SiO4](OH)
Common Impurities:
Fe
Crystallography of Niigataite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Setting:
P21/m
Cell Parameters:
a = 8.890(4) Å, b = 5.5878(18) Å, c = 10.211(4) Å
β = 115.12(3)°
β = 115.12(3)°
Ratio:
a:b:c = 1.591 : 1 : 1.827
Unit Cell V:
459.26 ų (Calculated from Unit Cell)
Z:
2
Morphology:
anhedral grains
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
5.05 Å | (23) |
3.22 Å | (25) |
2.90 Å | (100) |
2.79 Å | (48) |
2.70 Å | (26) |
2.60 Å | (24) |
2.11 Å | (24) |
Type Occurrence of Niigataite
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:
National Science Museum in Tokyo, and in the Fossa Magna Museum, Itoigawa, Niigata, Japan.
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:
Reference:
Miyajima, H., Matsubara, S., Miyawaki, R., Hirokawa, K. (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.
Synonyms of Niigataite
Other Language Names for Niigataite
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 Species
Member of:
Other Members of this group:
Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) | Mon. 2/m : P21/m |
Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) | Mon. 2/m : P21/m |
Epidote-(Sr) | (CaSr)(AlAlFe3+)O[Si2O7][SiO4](OH) | Mon. 2/m : P21/m |
Hancockite | (CaPb)(AlAlFe3+)O[Si2O7][SiO4](OH) | Mon. 2/m : P21/m |
Heflikite | (CaCa)(AlAlSc)O[Si2O7][SiO4](OH) | Mon. 2/m : P21/m |
Mukhinite | (CaCa)(AlAlV3+)O[Si2O7][SiO4](OH) | Mon. |
Piemontite | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) | Mon. 2/m : P21/m |
Piemontite-(Pb) | (CaPb)(AlAlMn3+)O[Si2O7][SiO4](OH) | Mon. 2/m : P21/m |
Piemontite-(Sr) | (CaSr)(AlAlMn3+)O[Si2O7][SiO4](OH) | Mon. 2/m : P21/m |
Tweddillite | (CaSr)(Mn3+AlMn3+)O[Si2O7][SiO4](OH) | Mon. 2/m : P21/m |
Unnamed (Fe3+ analogue of Piemontite-(Pb)) | (CaPb)(Fe3+AlMn3+)O[Si2O7][SiO4](OH) | |
Unnamed (Fe3+-analogue of Piemontite) | (CaCa)(Fe3+AlMn3+)O[Si2O7][SiO4](OH) | |
Unnamed (Fe3+-analogue of Piemontite-(Sr)) | (CaSr)(Fe3+AlMn3+)O[Si2O7][SiO4](OH) | |
Unnamed (Ga-analogue of Epidote) | (CaCa)(AlAlGa3+)O[Si2O7][SiO4](OH) |
Related Minerals - Strunz-mindat Grouping
9.BG. | Shuiskite-(Cr) | Ca2Cr3+Cr3+2[Si2O6OH][SiO4](OH)2O |
9.BG. | Alnaperbøeite-(Ce) | Ca(Ce2.5Na0.5)(AlAl2Al)[Si2O7][SiO4]3O(OH)2 |
9.BG. | Magnesiovesuvianite | Ca19MgAl4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10](OH)(OH)9 |
9.BG. | Alumovesuvianite | Ca19AlAl4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
9.BG. | Zoisite-(Pb) | (CaPb)(AlAlAl)O[Si2O7][SiO4](OH) |
9.BG. | Vielleaureite-(Ce) | (Mn2+Ce)(MgAlMn2+)F[Si2O7][SiO4](OH) |
9.BG. | Heflikite | (CaCa)(AlAlSc)O[Si2O7][SiO4](OH) |
9.BG. | Zilbermintsite-(La) | (CaLa5)(Fe3+Al3Fe2+)[Si2O7][SiO4]5O(OH)3 |
9.BG.05b | Allanite-(Ce) | (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH) |
9.BG.05b | Allanite-(La) | (CaLa)(AlAlFe2+)O[Si2O7][SiO4](OH) |
9.BG.05b | Allanite-(Y) | (CaY)(AlAlFe2+)O[Si2O7][SiO4](OH) |
9.BG.05a | Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
9.BG.05b | Dissakisite-(Ce) | (CaCe)(AlAlMg)O[Si2O7][SiO4](OH) |
9.BG.05 | Dollaseite-(Ce) | (CaCe)(MgAlMg)F[Si2O7][SiO4](OH) |
9.BG.05a | Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
9.BG.05a | Hancockite | (CaPb)(AlAlFe3+)O[Si2O7][SiO4](OH) |
9.BG.05 | Khristovite-(Ce) | (CaCe)(MgAlMn2+)F[Si2O7][SiO4](OH) |
9.BG.05a | Mukhinite | (CaCa)(AlAlV3+)O[Si2O7][SiO4](OH) |
9.BG.05a | Piemontite | (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH) |
9.BG.05 | Piemontite-(Sr) | (CaSr)(AlAlMn3+)O[Si2O7][SiO4](OH) |
9.BG.05b | Manganiandrosite-(La) | (Mn2+La)(Mn3+AlMn2+)O[Si2O7][SiO4](OH) |
9.BG.05 | Tweddillite | (CaSr)(Mn3+AlMn3+)O[Si2O7][SiO4](OH) |
9.BG.05b | Ferriallanite-(Ce) | (CaCe)(Fe3+AlFe2+)O[Si2O7][SiO4](OH) |
9.BG.05 | Manganiandrosite-(Ce) | (Mn2+Ce)(Mn3+AlMn2+)O[Si2O7][SiO4](OH) |
9.BG.05 | Dissakisite-(La) | (CaLa)(AlAlMg)O[Si2O7][SiO4](OH) |
9.BG.05 | Vanadoandrosite-(Ce) | (Mn2+Ce)(V3+AlMn2+)O[Si2O7][SiO4](OH) |
9.BG.05 | Uedaite-(Ce) | (Mn2+Ce)(AlAlFe2+)O[Si2O7][SiO4](OH) |
9.BG.05a | Epidote-(Sr) | (CaSr)(AlAlFe3+)O[Si2O7][SiO4](OH) |
9.BG.05b | Allanite-(Nd) | (CaNd)(AlAlFe2+)O[Si2O7][SiO4](OH) |
9.BG.05b | Unnamed (Mg-analogue of Ferriallanite-(Ce)) | (CaCe)(Fe3+AlMg)O[Si2O7][SiO4](OH) |
9.BG.05b | Unnamed (Mn3+-analogue of Ferriakasakaite-(Ce)) | (CaCe)(Mn3+AlMn2+)O[Si2O7][SiO4](OH) |
9.BG.05b | Ferriallanite-(La) | (CaLa)(Fe3+AlFe2+)O[Si2O7][SiO4](OH) |
9.BG.05b | Åskagenite-(Nd) | (Mn2+Nd)(AlAlFe3+)O[Si2O7][SiO4]O |
9.BG.05 | Piemontite-(Pb) | (CaPb)(AlAlMn3+)O[Si2O7][SiO4](OH) |
9.BG.05b | Vanadoallanite-(La) | (CaLa)(V3+AlFe2+)O[Si2O7][SiO4](OH) |
9.BG.05 | Ferriandrosite-(La) | (Mn2+La)(Fe3+AlMn2+)O[Si2O7][SiO4](OH) |
9.BG.05 | Androsite-(Ce) | (Mn2+Ce)(AlAlMn2+)O[Si2O7][SiO4](OH) |
9.BG.05a v | Unnamed (Ga-analogue of Epidote) | (CaCa)(AlAlGa3+)O[Si2O7][SiO4](OH) |
9.BG.05b | UM1989-32-SiO:AlCaFeHREE | (Ca0.5◻0.5REE)(AlAlFe3+)O[Si2O7][SiO4](OH) |
9.BG.05b | Manganiakasakaite-(La) | (CaLa)(Mn3+AlMn2+)O[Si2O7][SiO4](OH) |
9.BG.05b | Ferriakasakaite-(Ce) | (CaCe)(Fe3+AlMn2+)O[Si2O7][SiO4](OH) |
9.BG.9.BG. | Ferriakasakaite-(La) | (CaLa)(Fe3+AlMn2+)O[Si2O7][SiO4](OH) |
9.BG.9.BG. | Ferriandrosite-(Ce) | (Mn2+Ce)(Fe3+AlMn2+)O[Si2O7][SiO4](OH) |
9.BG.9.BG | Ferriperbøeite-(Ce) | CaCe3(Fe3+Al2Fe2+)[Si2O7][SiO4]3O(OH)2 |
9.BG.10 | Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
9.BG.15 | Macfallite | Ca2Mn3+3(SiO4)(Si2O7)(OH)3 |
9.BG.15 | Sursassite | Mn2+2Al3(SiO4)(Si2O7)(OH)3 |
9.BG.20 | Julgoldite-(Fe2+) | Ca2Fe2+Fe3+2[Si2O6OH][SiO4](OH)2(OH) |
9.BG.20 | Okhotskite | Ca2Mn2+Mn3+2[Si2O6OH][SiO4](OH)2(OH) |
9.BG.20 | Pumpellyite-(Fe2+) | Ca2Fe2+Al2(Si2O7)(SiO4)(OH,O)2 · H2O |
9.BG.20 | Pumpellyite-(Fe3+) | Ca2Fe3+Al2(Si2O7)(SiO4)(OH,O)2 · H2O |
9.BG.20 | Pumpellyite-(Mg) | Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O |
9.BG.20 | Pumpellyite-(Mn2+) | Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O |
9.BG.20 | Shuiskite-(Mg) | Ca2MgCr3+2[Si2O6OH][SiO4](OH)2(OH) |
9.BG.20 | Julgoldite-(Fe3+) | Ca2Fe3+Fe3+2[Si2O6OH][SiO4](OH)2O |
9.BG.20 | Pumpellyite-(Al) | Ca2Al3(Si2O7)(SiO4)(OH,O)2 · H2O |
9.BG.20 | Poppiite | Ca2V3+V3+2[Si2O6OH][SiO4](OH)2O |
9.BG.20 | Julgoldite-(Mg) | Ca2MgFe3+2[Si2O6OH][SiO4](OH)2(OH) |
9.BG.25 | Ganomalite | Pb9Ca5Mn(Si2O7)4(SiO4)O |
9.BG.25 | Wayneburnhamite | Pb9Ca6(Si2O7)3(SiO4)3 |
9.BG.30 | Rustumite | Ca10(Si2O7)2(SiO4)(OH)2Cl2 |
9.BG.35 | Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
9.BG.35 | Wiluite | Ca19MgAl4(Al,Mg)8(B,◻)4◻[Si2O7]4[(SiO4)10]O(O,OH)9 |
9.BG.35 | Manganvesuvianite | Ca19Mn3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
9.BG.35 | Fluorvesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(F,OH)9 |
9.BG.35 | Cyprine | Ca19Cu2+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10](OH)(OH)9 |
9.BG.35 | Hongheite | Ca19Fe2+Al4(Fe3+,Mg)8(◻4)B[Si2O7]4[(SiO4)10]O(OH,O)9 |
9.BG.35 | Milanriederite | (Ca18[REE])Fe3+Al4(Mg4Al4)(◻4)◻[Si2O7]4[(SiO4)10](OH)(OH)9 |
9.BG.35 | Manaevite-(Ce) | (Ca13Ce4[H2O]2)Mg(Al3Mg)(Mg3Ti3Fe3+2)(◻4)◻[Si2O7]4[(SiO4)8(H4O4)2]O(OH)9 |
9.BG.40 | Vyuntspakhkite-(Y) | (Y,Yb)4Al2.5-1.5(Si,Al)1.5-2.5(SiO4)4O(OH)7 |
9.BG.45 | Dellaite | Ca6Si3O11(OH)2 |
9.BG.50 | Gatelite-(Ce) | CaCe3(AlAl2Mg)[Si2O7][SiO4]3O(OH)2 |
9.BG.50 | Perbøeite-(Ce) | CaCe3(AlAl2Fe2+)[Si2O7][SiO4]3O(OH)2 |
9.BG.50 | Ferriperbøeite-(La) | CaLa3(Fe3+Al2Fe2+)[Si2O7][SiO4]3O(OH)2 |
9.BG.50 | Perbøeite-(La) | CaLa3(AlAl2Fe2+)[Si2O7][SiO4]3O(OH)2 |
9.BG.55 | Västmanlandite-(Ce) | CaCe3(MgAl2Mg)[Si2O7][SiO4]3F(OH)2 |
9.BG.60 | Radekškodaite-(La) | (CaLa5)(Al4Fe2+)[Si2O7][SiO4]5O(OH)3 |
9.BG.60 | Radekškodaite-(Ce) | (CaCe5)(Al4Fe2+)[Si2O7][SiO4]5O(OH)3 |
Fluorescence of Niigataite
none
Other Information
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 Niigataite
mindat.org URL:
https://www.mindat.org/min-11460.html
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References for Niigataite
Reference List:
Miyajima, Hiroshi, Matsubara, Satoshi, Miyawaki, Ritsuro, Hirokawa, Kazuo (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 Mineralogical and Petrological Sciences, 98 (3) 118-129 doi:10.2465/jmps.98.118
Localities for Niigataite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
Japan | |
| ... +1 other reference |
| Miyajima et al. (2003) |
| Norimasa SHIMOBAYASHI (2004) |
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