Vote for your favorite mineral in #MinCup26! - Azurite vs. Smithsonite
It's carbonate-vs-carbonate to kick off Mineral Cup 2026 with copper-rich Azurite against zinc-rich Smithsonite.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Arupite

A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
05661820017271921122029.jpg
Arupite, etc.

Santa Catharina meteorite, Morro do Rócio, São Francisco do Sul, Santa Catarina, Brazil
04952540017271921168887.jpg
Arupite

Santa Catharina meteorite, Morro do Rócio, São Francisco do Sul, Santa Catarina, Brazil
05661820017271921122029.jpg
Arupite, etc.

Santa Catharina meteorite, Morro do Rócio, São Francisco do Sul, Santa Catarina, Brazil
04952540017271921168887.jpg
Arupite

Santa Catharina meteorite, Morro do Rócio, São Francisco do Sul, Santa Catarina, Brazil
05661820017271921122029.jpg
Arupite, etc.

Santa Catharina meteorite, Morro do Rócio, São Francisco do Sul, Santa Catarina, Brazil
04952540017271921168887.jpg
Arupite

Santa Catharina meteorite, Morro do Rócio, São Francisco do Sul, Santa Catarina, Brazil
Hide all sections | Show all sections

About ArupiteHide

Formula:
Ni3(PO4)2 · 8H2O
Colour:
Blue to light blue
Lustre:
Dull, Earthy
Hardness:
1½ - 2
Specific Gravity:
2.85 (Calculated)
Crystal System:
Monoclinic
Member of:
Vivianite Group
Name:
Named in 1990 by Vagn Fabius Buchwald in honor of Hans Henning Arup (4 May 1928 - 19 November 2012), Director of the Danish Corrosion Center, Copenhagen, Denmark.
The nickel analogue of Vivianite.


Unique IdentifiersHide

Mindat ID:
379
Long-form identifier:
mindat:1:1:379:3

IMA Classification of ArupiteHide

IMA status:
Approved
IMA Formula:
Ni2+3(PO4)2·8H2O
Approval year:
1988
First published:
1990

Classification of ArupiteHide

Strunz-mindat (2026):
8.CE.40

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
Dana 8th ed.:
40.3.6.8

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
3 : A3(XO4)2·xH2O
Hey's CIM Ref.:
19.15.1

19 : Phosphates
15 : Phosphates of Ni

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
ArpIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of ArupiteHide

Lustre:
Dull, Earthy
Transparency:
Translucent
Colour:
Blue to light blue
Streak:
Light blue
Hardness:
1½ - 2 on Mohs scale
Density:
2.85 g/cm3 (Calculated)

Optical Data of ArupiteHide

Type:
Biaxial (+)
RI values:
nα = 1.632 nβ = 1.65 nγ = 1.680
2V:
Measured: 60° to 70°, Calculated: 78°
Birefringence:
0.048
Max. Birefringence:
δ = 0.048
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.

Surface Relief:
Moderate
Dispersion:
r < v strong
Pleochroism:
Visible
Comments:
X = blue, Z = colorless

Chemistry of ArupiteHide

Mindat Formula:
Ni3(PO4)2 · 8H2O
Element Weights:
Element% weight
O50.180 %
Ni34.516 %
P12.143 %
H3.161 %

Calculated from ideal end-member formula.
Elements listed:
H, Ni, O, P - search for minerals with similar chemistry
Common Impurities:
Fe

Crystallography of ArupiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Cell Parameters:
a = 9.889 Å, b = 13.225 Å, c = 4.645 Å
β = 102.41°
Ratio:
a:b:c = 0.748 : 1 : 0.351
Unit Cell V:
593.29 ų (Calculated from Unit Cell)
Z:
2
Comment:
I2/m

Crystal StructureHide

Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File    Best | x | y | z | a | b | c
Rotation
Stop | Start
Labels
Console Off | On | Grey | Yellow
IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0018468ArupiteShouwen J, Wang D, Gao X, Wen X, Zhou J (2008) Poly[octaaquadi-mu-phosphato-tri-nickel(II)] Acta Crystallographica E64 m259-m2592008synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.878 Å(26)
6.624 Å(100)
4.818 Å(24)
3.805 Å(21)
3.152 Å(24)
2.922 Å(23)
2.672 Å(17)

Geological EnvironmentHide

Type Occurrence of ArupiteHide

Type Locality:
ⓘ Santa Catharina meteorite, Morro do Rócio, São Francisco do Sul, Santa Catarina, Brazil
General Appearance of Type Material:
Short prismatic blue crystals to 5 microns.
Place of Conservation of Type Material:
Division of Meteorites, National Museum of Natural History, Washington, D.C., USA, numbers 659, 804, 877.
Geological Setting of Type Material:
Weathered meteorite.
Associated Minerals at Type Locality:
AkaganeiteGoethiteHematiteHonessiteMagnetite
Reevesite

Synonyms of ArupiteHide

Other Language Names for ArupiteHide

Dutch:Arupiet
French:Arupite
German:Arupit
Norwegian:Arupitt
Russian:Арупит
Spanish:Arupita

Relationship of Arupite to other SpeciesHide

Member of:
Vivianite Group
Other Members of Vivianite Group:
AnnabergiteNi3(AsO4)2 · 8H2OMon. 2/m : B2/m
BabánekiteCu3(AsO4)2 · 8H2O Mon. 2/m : B2/m
Barićite(Mg,Fe)3(PO4)2 · 8H2OMon. 2/m : B2/m
CabreriteNiMg2(AsO4)2 · 8H2OMon. 2/m : B2/m
ErythriteCo3(AsO4)2 · 8H2OMon. 2/m : B2/m
GritsenkoiteCoMg2(AsO4)2(H2O)8Mon. 2/m : B2/m
HörnesiteMg3(AsO4)2 · 8H2OMon. 2/m : B2/m
KöttigiteZn3(AsO4)2 · 8H2OMon. 2/m : B2/m
ManganohörnesiteMn2+3(AsO4)2 · 8H2OMon. 2/m : P2/m
MonteneroiteCu2+Mn2+2(AsO4)2 · 8H2OMon. 2/m : B2/m
PakhomovskyiteCo3(PO4)2 · 8H2OMon. 2/m : B2/m
ParasymplesiteFe2+3(AsO4)2 · 8H2OMon. 2/m : B2/m
VivianiteFe2+Fe2+2(PO4)2 · 8H2OMon. 2/m : B2/m
ZincocabreriteZnMg2(AsO4)2(H2O)8Mon. 2/m : B2/m

Common AssociatesHide

Associations Based on Photo Data:
1 photo of Arupite associated with GoethiteFe3+O(OH)
1 photo of Arupite associated with FayaliteFe2+2(SiO4)
1 photo of Arupite associated with 'Kamacite'(Fe,Ni)
1 photo of Arupite associated with TroiliteFeS

Related Minerals - Strunz-mindat GroupingHide

8.CE.MonteneroiteCu2+Mn2+2(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.BelmonteiteCaMn2(AsO4)2 · 7H2OOrth. mm2
8.CE.XBabánekiteCu3(AsO4)2 · 8H2O Mon. 2/m : B2/m
8.CE.05ChudobaiteMg5(AsO4)2(AsO3OH)2 · 10H2OTric. 1 : P1
8.CE.05GeigeriteMn2+5(AsO4)2(HAsO4)2 · 10H2OTric. 1 : P1
8.CE.10NewberyiteMg(PO3OH) · 3H2OOrth. mmm(2/m2/m2/m) : Pbca
8.CE.10ManganonewberyiteMn(PO3OH)(H2O)3Orth. mmm(2/m2/m2/m) : Pbca
8.CE.15Fanguangite(MoO2)(PO3OH) · 4H2OTric. 1 : P1
8.CE.15BrassiteMg(HAsO4) · 4H2OOrth. mmm(2/m2/m2/m) : Pbca
8.CE.20PhosphorrössleriteMg(PO3OH) · 7H2OMon. 2/m : P2/b
8.CE.20RössleriteMg(HAsO4) · 7H2OMon. 2/m : B2/b
8.CE.25SwitzeriteMn2+3(PO4)2 · 7H2OMon. 2/m : P21/b
8.CE.25MetaswitzeriteMn2+3(PO4)2 · 4H2OMon. 2/m : P2/b
8.CE.30PradetiteCoCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CE.30VeselovskýiteZnCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CE.30LindackeriteCuCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CE.30KlajiteMnCu4(AsO4)2(HAsO4)2 · 9-10H2OTric. 1 : P1
8.CE.30Hloušekite(Ni,Co)Cu4(AsO4)2(AsO3OH)2 · 9H2OTric. 1 : P1
8.CE.30OndrušiteCaCu4(AsO4)2(HAsO4)2 · 10H2OTric. 1 : P1
8.CE.35BobierriteMg3(PO4)2 · 8H2OMon. 2/m : B2/b
8.CE.40Barićite(Mg,Fe)3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40ParasymplesiteFe2+3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40GritsenkoiteCoMg2(AsO4)2(H2O)8Mon. 2/m : B2/m
8.CE.40CabreriteNiMg2(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40PakhomovskyiteCo3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40VivianiteFe2+Fe2+2(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40ErythriteCo3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40HörnesiteMg3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40ManganohörnesiteMn2+3(AsO4)2 · 8H2OMon. 2/m : P2/m
8.CE.40KöttigiteZn3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40FerrisymplesiteFe3+3(AsO4)2(OH)3 · 5H2OMon.
8.CE.40AnnabergiteNi3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.45SymplesiteFe2+3(AsO4)2 · 8H2OTric. 1 : P1
8.CE.50CattiiteMg3(PO4)2 · 22H2OTric. 1 : P1
8.CE.55KoninckiteFe3+PO4 · 3H2OTet. 422 : P41212
8.CE.60KaňkiteFeAsO4 · 3.5H2OMon. 2 : P2
8.CE.60HilarioniteFe3+2(SO4)(AsO4)(OH) · 6H2OMon. 2/m : B2/m
8.CE.65SteigeriteAl(VO4) · 3H2OMon. 2/m : P21/m
8.CE.70MetaschoderiteAl2(PO4)(VO4) · 6H2OMon. 2/m : P2/m
8.CE.70SchoderiteAl2(PO4)(VO4) · 8H2OMon.
8.CE.75ZigrasiteMgZr(PO4)2 · 4H2OTric. 1 : P1
8.CE.75'UM2009-11-PO:CaHZr'CaZr[PO4]2 · 4H2OTric.
8.CE.75MalhmooditeFeZr(PO4)2 · 4H2OMon. 2/m : P21/b
8.CE.80SantabarbaraiteFe3+3(PO4)2(OH)3 · 5H2OAmor.
8.CE.85Metaköttigite(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)Tric. 1 : P1
8.CE.90SlavkoviteCu13(AsO4)6(AsO3OH)4 · 23H2OTric. 1 : P1

Fluorescence of ArupiteHide

In UV light:
Not fluorescent.

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 ArupiteHide

References for ArupiteHide

Localities for ArupiteHide

Showing 2 localities.

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.
Hide all sections | Show all sections

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.
Brazil (TL)
 
  • Santa Catarina
    • São Francisco do Sul
      • Morro do Rócio
Buchwald (1990) +1 other reference
Japan
 
  • Mie Prefecture
    • Toba City
The Mineral Species of Japan (5th ed) +1 other reference
Quick NavTopAbout ArupiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 1, 2026 13:16:56 Page updated: August 18, 2026 22:04:57
Go to top of page