Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportAdd Glossary Item
StatisticsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Zaïrite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
BiFe33+(PO4)2(OH)6
System:
Trigonal
Colour:
Green, light olive green
Hardness:
Name:
Named after its discovery locality, Eta-Etu, Kivu, Congo (Zaïre).
The ferric iron analogue of waylandite.

Medium to light olive-green irregular plates.

Classification of Zaïrite

Approved 1975
7/B.36-170
8.BL.13

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
L : With medium-sized and large cations, (OH, etc.):RO4 = 3:1
41.5.12.3

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
19.14.33

19 : Phosphates
14 : Phosphates of Fe and other metals
mindat.org URL:
http://www.mindat.org/min-4382.html
Please feel free to link to this page.

First Recorded Occurrence of Zaïrite

General Appearance of First Recorded Material:
Medium to light olive green irregular plates.
Year of Discovery:
1975
Geological Setting of First Recorded Material:
Granite pegmatite.
Associated Minerals at First Recorded Locality:

Physical Properties of Zaïrite

Waxy, Dull
Diaphaneity (Transparency):
Translucent
Colour:
Green, light olive green
Streak:
White
Hardness (Mohs):
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
4.42 g/cm3 (Calculated)

Crystallography of Zaïrite

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3m
Cell Parameters:
a = 7.015Å, c = 16.365Å
Ratio:
a:c = 1 : 2.333
Unit Cell Volume:
V 697.43 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Found as irregular intersecting plates (<1 mm), perhaps fracture fillings with original mineral dissolved away.
X-Ray Powder Diffraction Data:
d-spacingIntensity
5.71 (100)
4.87 (10)
3.50 (40)
2.95 (90)
2.85 (10)
2.73 (20)
2.16 (10)
1.877 (10)
Comments:
29-226

Optical Data of Zaïrite

Type:
Uniaxial (-)
RI values:
nω = 1.820 - 1.830 nε = 1.810
Birefringence:
Weak to moderate
Max Birefringence:
δ = 0.010 - 0.020
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of Zaïrite

Formula:
BiFe33+(PO4)2(OH)6
Essential elements:
All elements listed in formula:
Common Impurities:
Ca,Cu,Ba,S,Si,Te

Relationship of Zaïrite to other Species

Other Members of Group:
BenauiteSrFe33+(HPO4,PO4)2(OH)6
CrandalliteCaAl3(PO4)2(OH)5 · H2O
EylettersiteTh0.75Al3(PO4)2(OH)6
Florencite-(Ce)CeAl3(PO4)2(OH)6
Florencite-(La)LaAl3(PO4)2(OH)6
Florencite-(Nd)(Nd,La,Ce)Al3(PO4)2(OH)6
Florencite-(Sm)(Sm,Nd)Al3(PO4)2(OH)6
GalloplumbogummitePb(Ga,Al)3-xGexH1-x(PO4)2(OH)6 for 0 ≤ x ≤ 1
GorceixiteBaAl3(PO4)2(OH)5 · H2O
GoyaziteSrAl3(PO4)2(OH)5 · H2O
KintoreitePbFe3(PO4)(PO3OH)(OH)6
Kintoreite-2cPbFe33+(PO4)2(OH,H2O)6
PlumbogummitePbAl3(PO4)2(OH)5 · H2O
SpringcreekiteBaV33+(PO4)2(OH,H2O)6
WaylanditeBiAl3(PO4)2(OH)6
8.BL.05BeudantitePbFe3(AsO4)(SO4)(OH)6
8.BL.05CorkitePbFe3(PO4)(SO4)(OH)6
8.BL.05HidalgoitePbAl3(AsO4)(SO4)(OH)6
8.BL.05HinsdalitePbAl3(PO4)(SO4)(OH)6
8.BL.05KemmlitziteSrAl3(AsO4)(SO4)(OH)6
8.BL.05SvanbergiteSrAl3(PO4)(SO4)(OH)6
8.BL.05WoodhouseiteCaAl3(PO4)(SO4)(OH)6
8.BL.05GallobeudantitePbGa3(AsO4)(SO4)(OH)6
8.BL.10ArsenogoyaziteSrAl3(AsO4)2(OH)5 · H2O
8.BL.10ArsenogorceixiteBaAl3(AsO4)2(OH)5 · H2O
8.BL.10ArsenocrandalliteCaAl3(AsO4)2(OH)5 · H2O
8.BL.10BenauiteSrFe33+(HPO4,PO4)2(OH)6
8.BL.10CrandalliteCaAl3(PO4)2(OH)5 · H2O
8.BL.10DussertiteBaFe33+(AsO4)2(OH)5
8.BL.10EylettersiteTh0.75Al3(PO4)2(OH)6
8.BL.10GorceixiteBaAl3(PO4)2(OH)5 · H2O
8.BL.10GoyaziteSrAl3(PO4)2(OH)5 · H2O
8.BL.10KintoreitePbFe3(PO4)(PO3OH)(OH)6
8.BL.10PhilipsbornitePbAl3(AsO4)2(OH)5 · H2O
8.BL.10PlumbogummitePbAl3(PO4)2(OH)5 · H2O
8.BL.10SegnititePbFe33+(AsO4)2(OH,H2O)6
8.BL.10SpringcreekiteBaV33+(PO4)2(OH,H2O)6
8.BL.13Arsenoflorencite-(La)LaAl3(AsO4)2(OH)6
8.BL.13Arsenoflorencite-(Nd)NdAl3(AsO4)2(OH)6
8.BL.13Arsenoflorencite-(Ce)CeAl3(AsO4)2(OH)6
8.BL.13Florencite-(Ce)CeAl3(PO4)2(OH)6
8.BL.13Florencite-(La)LaAl3(PO4)2(OH)6
8.BL.13Florencite-(Nd)(Nd,La,Ce)Al3(PO4)2(OH)6
8.BL.13WaylanditeBiAl3(PO4)2(OH)6
8.BL.13ArsenowaylanditeBiAl3(AsO4)2(OH)6
8.BL.13Graulichite-(Ce)CeFe33+(AsO4)2(OH)6
8.BL.13Florencite-(Sm)(Sm,Nd)Al3(PO4)2(OH)6
8.BL.15ViitaniemiiteNa(Ca,Mn2+)Al(PO4)(F,OH)3
8.BL.25PattersonitePbFe33+(PO4)2(OH)5 · H2O
19.14.1CyriloviteNaFe33+(PO4)2(OH)4 · 2H2O
19.14.2KidwelliteNaFe93+(PO4)6(OH)11 · 3H2O
19.14.3Rosemaryite(Na,Ca,Mn)(Mn,Fe2+)(Fe3+,Mg)Al(PO4)3
19.14.4Wyllieite(Na,Ca,Mn)(Mn,Fe)(Fe,Mg)Al(PO4)3
19.14.5Ferrowyllieite(Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3
19.14.6NatrodufréniteNaFe2+Fe53+(PO4)4(OH)6 · 2H2O
19.14.7LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
19.14.8Spheniscidite(NH4,K)(Fe3+,Al)2(PO4)2(OH) · 2H2O
19.14.9BurangaiteNaFe2+Al5(PO4)4(OH)6 · 2H2O
19.14.10Satterlyite(Fe2+,Mg,Fe3+)2(PO4)(OH,O)
19.14.11UshkoviteMgFe23+(PO4)2(OH)2 · 8H2O
19.14.12Garyansellite(Mg,Fe)3(PO4)2(OH,O) · 1.5H2O
19.14.13ThadeuiteCa(Mg,Fe2+)3(PO4)2(OH,F)2
19.14.14AnapaiteCa2Fe2+(PO4)2 · 4H2O
19.14.15XanthoxeniteCa4Fe23+(PO4)4(OH)2 · 3H2O
19.14.16CalcioferriteCa2Fe23+(PO4)3(OH) · 7H2O
19.14.17MitridatiteCa2Fe33+(PO4)3O2 · 3H2O
19.14.18MélonjosephiteCaFe2+Fe3+(PO4)2(OH)
19.14.19DelvauxiteCaFe4(PO4,SO4)2(OH)8 · 4-6H2O not confirmed ·
19.14.20CollinsiteCa2(Mg,Fe2+)(PO4)2 · 2H2O
19.14.21SegeleriteCa2 Mg2 Fe23+(PO4)4(OH)2 · 8H2O
19.14.22KingsmountiteCa4(Fe2+,Mn2+)Al4(PO4)6(OH)4 · 12H2O
19.14.23VauxiteFe2+Al2(PO4)2(OH)2 · 6H2O
19.14.24MetavauxiteFe2+Al2(PO4)2(OH)2 · 8H2O
19.14.25ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2O
19.14.26SigloiteFe3+Al2(PO4)2(OH)3 · 7H2O
19.14.27CacoxeniteFe243+Al(PO4)17O6(OH)12 · 17H2O
19.14.28KoninckiteFe3+PO4 · 3H2O
19.14.29Lazulite(Mg,Fe2+)Al2(PO4)2(OH)2
19.14.30ScorzaliteFe2+Al2(PO4)2(OH)2
19.14.31Souzalite(Mg,Fe2+)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O
19.14.32Gormanite(Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O

Other Names for Zaïrite

Name in Other Languages:

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.

References for Zaïrite

Reference List:
van Wambeke, L. (1975) La zairite, un nouveau minéral appartenant à la serie de la crandallite. Bulletin de la Société française de Minéralogie et de Cristallographie: 98: 351-353. (in French) [Am.Min.(1977): 62: 174-175 (abstract].

Canadian Mineralogist (1999) 37: 1323

Internet Links for Zaïrite

Localities for Zaïrite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Democratic Republic of Congo (Zaïre)
 
  • Kivu
Bull. Soc. fr. Mineral. Cristallogr., 98, 351-353; Am. Min. (1977) 62, 174-175
Germany
 
  • Bavaria
    • Upper Palatinate
      • Pleystein
Dill, H.G., Weber, B. (2009), Pleystein-City on Pegmatite, 4th International Symposium on Granitic Pegmatites, Recife, Brazil.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2015, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: March 29, 2015 08:26:50 Page generated: March 18, 2015 03:05:38