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Pseudolaueite

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About PseudolaueiteHide

Formula:
Mn2+Fe3+2(PO4)2(OH)2 · 8H2O
Colour:
Orange-yellow to amber-yellow
Lustre:
Sub-Vitreous, Resinous
Hardness:
3
Specific Gravity:
2.463
Crystal System:
Monoclinic
Name:
Named in 1956 by Hugo Strunz for the chemical similarity to laueite. (Stewartite and strunzite have different amounts of structural water and are not strictly polymorphs of laueite.)
Polymorph of:
Related to the Laueite Group, but not a true polymorph as there are six water molecules in laueite.


Classification of PseudolaueiteHide

Approved, 'Grandfathered' (first described prior to 1959)
8.DC.30

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
C : With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1
42.11.10.3

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O
19.12.25

19 : Phosphates
12 : Phosphates of Mn

Physical Properties of PseudolaueiteHide

Sub-Vitreous, Resinous
Transparency:
Transparent, Translucent
Colour:
Orange-yellow to amber-yellow
Streak:
White
Hardness:
Comment:
White to pale yellow
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.463 g/cm3 (Measured)    2.51 g/cm3 (Calculated)

Optical Data of PseudolaueiteHide

Type:
Biaxial (+)
RI values:
nα = 1.626 nβ = 1.650 nγ = 1.686
2V:
Measured: 80° , Calculated: 80°
Birefringence:
0.060
Max Birefringence:
δ = 0.060
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
weak
Optical Extinction:
Z=b, X^c = 2°, Y^a = 12°
Pleochroism:
Weak
Comments:
X = Y pale yellow, Z = yellow

Chemical Properties of PseudolaueiteHide

Formula:
Mn2+Fe3+2(PO4)2(OH)2 · 8H2O

Crystallography of PseudolaueiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/a
Cell Parameters:
a = 9.59 Å, b = 7.42 Å, c = 10.16 Å
β = 104.43°
Ratio:
a:b:c = 1.292 : 1 : 1.369
Unit Cell V:
700.16 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Pseudohexagonal tablets, also nearly tabulat to slightly columnar

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.926 Å(100)
5.869 Å(70)
4.678 Å(30)
3.908 Å(30)
3.472 Å(40)
3.186 Å(30)
3.069 Å(30)

Geological EnvironmentHide

Geological Setting:
Late stage phosphate mineralization in granite pegmatite

Type Occurrence of PseudolaueiteHide

General Appearance of Type Material:
Amber-yellow pseudohexagonal plates.
Geological Setting of Type Material:
Late stage crystallization of phosphates in a granite pegmatite
Associated Minerals at Type Locality:

Other Language Names for PseudolaueiteHide

Relationship of Pseudolaueite to other SpeciesHide

Structurally related to group(s):
Laueite GroupM12+M23+M33+(PO4)2(OH)2·8H2O

Common AssociatesHide

Associated Minerals Based on Photo Data:
6 photos of Pseudolaueite associated with StewartiteMn2+Fe3+2(PO4)2(OH)2 · 8H2O
3 photos of Pseudolaueite associated with StrunziteMn2+Fe3+2(PO4)2(OH)2 · 6H2O
3 photos of Pseudolaueite associated with RockbridgeiteFe2+Fe3+4(PO4)3(OH)5
3 photos of Pseudolaueite associated with LaueiteMn2+Fe3+2(PO4)2(OH)2 · 8H2O
2 photos of Pseudolaueite associated with WhitmoreiteFe2+Fe3+2(PO4)2(OH)2 · 4H2O
1 photo of Pseudolaueite associated with CacoxeniteFe3+24AlO6(PO4)17(OH)12 · 75H2O
1 photo of Pseudolaueite associated with MolybdeniteMoS2
1 photo of Pseudolaueite associated with QuartzSiO2
1 photo of Pseudolaueite associated with MitridatiteCa2Fe3+3(PO4)3O2 · 3H2O
1 photo of Pseudolaueite associated with PhosphosideriteFePO4 · 2H2O

Related Minerals - Nickel-Strunz GroupingHide

8.DC.05NissoniteCu2Mg2(PO4)2(OH)2 · 5H2OMon.
8.DC.07EuchroiteCu2(AsO4)(OH) · 3H2OOrth. 2 2 2 : P21 21 21
8.DC.10LegranditeZn2(AsO4)(OH) · H2OMon. 2/m : P21/b
8.DC.12StrashimiriteCu8(AsO4)4(OH)4 · 5H2OMon.
8.DC.15ArthuriteCuFe3+2(AsO4)2(OH)2 · 4H2OMon.
8.DC.15EarlshannoniteMn2+Fe3+2(PO4)2(OH)2 · 4H2OMon.
8.DC.15OjuelaiteZnFe3+2(AsO4)2(OH)2 · 4H2OMon.
8.DC.15WhitmoreiteFe2+Fe3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15Cobaltarthurite(Co,Mg)Fe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15BendadaiteFe2+Fe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15KunatiteCuFe3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15UKI-2006-(PO:FeHZn)ZnFe3+2(PO4)2(OH)2 · 4H2OMon.
8.DC.15UKI-2006-(PO:AlCuFeH)Fe2+Al3+2(PO4)2(OH)2 · 4H2O
8.DC.17KleemaniteZnAl2(PO4)2(OH)2 · 3H2OMon.
8.DC.20BermaniteMn2+Mn3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P2/b
8.DC.20CoralloiteMn2+Mn3+2(AsO4)2(OH)2 · 4H2OTric. 1 : P1
8.DC.22KovdorskiteMg2(PO4)(OH) · 3H2OMon.
8.DC.25FerristrunziteFe3+Fe3+2(PO4)2(OH)3 · 5H2OTric.
8.DC.25FerrostrunziteFe2+Fe3+2(PO4)2(OH)2 · 6H2OTric.
8.DC.25MetavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OMon. 2/m : P21/b
8.DC.25MetavivianiteFe2+Fe3+2(PO4)2(OH)2 · 6H2OTric. 1 : P1
8.DC.25StrunziteMn2+Fe3+2(PO4)2(OH)2 · 6H2OTric. 1 : P1
8.DC.27BerauniteFe2+Fe3+5(PO4)4(OH)5 · 6H2OMon. 2/m : B2/b
8.DC.30GordoniteMgAl2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30LaueiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30MangangordoniteMn2+Al2(PO4)2(OH)2 · 8H2OTric.
8.DC.30ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30SigloiteFe3+Al2(PO4)2(OH)3 · 7H2OTric.
8.DC.30StewartiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30UshkoviteMgFe3+2(PO4)2(OH)2 · 8H2OTric.
8.DC.30FerrolaueiteFe2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30Kastningite(Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30MaghrebiteMgAl2(AsO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30NordgauiteMnAl2(PO4)2(F,OH)2 · 5H2OTric. 1 : P1
8.DC.32TinticiteFe3+5.34(PO4)3.62(VO4)0.38(OH)4 · 6.7H2OTric. 1 : P1
8.DC.35VauxiteFe2+Al2(PO4)2(OH)2 · 6H2OTric. 1 : P1
8.DC.37VantasseliteAl4(PO4)3(OH)3 · 9H2OOrth.
8.DC.40CacoxeniteFe3+24AlO6(PO4)17(OH)12 · 75H2OHex. 6/m : P63/m
8.DC.45Gormanite(Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2OTric.
8.DC.45Souzalite(Mg,Fe2+)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2OTric.
8.DC.47KingiteAl3(PO4)2F2(OH) · 7H2OTric.
8.DC.50WavelliteAl3(PO4)2(OH,F)3 · 5H2OOrth. mmm (2/m 2/m 2/m)
8.DC.50AllanpringiteFe3+3(PO4)2(OH)3 · 5H2OMon. 2/m : P21/m
8.DC.52KribergiteAl5(PO4)3(SO4)(OH)4 · 4H2OTric. 1 : P1
8.DC.55MapimiteZn2Fe3+3(AsO4)3(OH)4 · 10H2OMon.
8.DC.57OgdensburgiteCa2Fe3+4(Zn,Mn2+)(AsO4)4(OH)6 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmmm
8.DC.60Nevadaite(Cu2+,Al,V3+)6Al8(PO4)8F8(OH)2 · 22H2OOrth. mmm (2/m 2/m 2/m)
8.DC.60CloncurryiteCu0.5(VO)0.5Al2(PO4)2F2 · 5H2OMon. 2/m : P21/b

Related Minerals - Dana Grouping (8th Ed.)Hide

42.11.10.1LaueiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
42.11.10.2StewartiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
42.11.10.4UshkoviteMgFe3+2(PO4)2(OH)2 · 8H2OTric.
42.11.10.7FerrolaueiteFe2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.12.1MetaswitzeriteMn2+3(PO4)2 · 4H2OMon. 2/m : P2/b
19.12.2BermaniteMn2+Mn3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P2/b
19.12.3NatrophiliteNaMn2+PO4Orth. mmm (2/m 2/m 2/m) : Pmna
19.12.4SidorenkiteNa3Mn2+(CO3)(PO4)Mon.
19.12.5Niahite(NH4)(Mn2+,Mg)(PO4) · H2OOrth. mm2 : Pmn21
19.12.6RobertsiteCa2Mn3+3(PO4)3O2 · 3H2OMon. m : Bb
19.12.7PararobertsiteCa2Mn3+3(PO4)3O2 · 3H2OMon. 2/m : P21/b
19.12.8SinkankasiteMn2+Al(PO3OH)2(OH) · 6H2OTric.
19.12.9MangangordoniteMn2+Al2(PO4)2(OH)2 · 8H2OTric.
19.12.10Heterosite(Fe3+,Mn3+)PO4Orth. mmm (2/m 2/m 2/m) : Pmna
19.12.11PurpuriteMn3+(PO4)Orth. mmm (2/m 2/m 2/m) : Pmna
19.12.12Wolfeite(Fe2+,Mn2+)2(PO4)(OH)Mon. 2/m : P21/b
19.12.13Triploidite(Mn2+,Fe2+)2(PO4)(OH)Mon. 2/m : P2/b
19.12.14LipscombiteFe2+Fe3+2(PO4)2(OH)2Tet.
19.12.15FrondeliteMn2+Fe3+4(PO4)3(OH)5Orth. 2 2 2 : C2 2 21
19.12.16RockbridgeiteFe2+Fe3+4(PO4)3(OH)5Orth. mmm (2/m 2/m 2/m)
19.12.17Kryzhanovskite(Fe3+,Mn2+)3(PO4)2(OH,H2O)3Orth.
19.12.18LandesiteMn2+3-xFe3+x(PO4)2(OH)x · (3-x)H2OOrth.
19.12.19Phosphoferrite(Fe2+,Mn2+)3(PO4)2 · 3H2OOrth. mmm (2/m 2/m 2/m) : Pmna
19.12.20Reddingite(Mn2+,Fe2+)3(PO4)2 · 3H2OOrth. mmm (2/m 2/m 2/m) : Pmna
19.12.21EarlshannoniteMn2+Fe3+2(PO4)2(OH)2 · 4H2OMon.
19.12.22Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2OMon. 2/m : B2/b
19.12.23SwitzeriteMn2+3(PO4)2 · 7H2OMon.
19.12.24LaueiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
19.12.26StrunziteMn2+Fe3+2(PO4)2(OH)2 · 6H2OTric. 1 : P1
19.12.27StewartiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
19.12.28Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3Mon.
19.12.29Ferroalluaudite(Na,Ca)Fe2+(Fe3+,Mn2+,Fe2+)2(PO4)3Mon. 2/m : B2/b
19.12.30Fillowite{Mn2+}{Na8}{Ca4Na4}{(Mn2+,Fe2+)43}(PO4)36Trig. 3 : R3
19.12.31JohnsomervilleiteNa10Ca6Mg18Fe25(PO4)36Trig.
19.12.32WicksiteNaCa2(Fe2+,Mn2+)4MgFe3+(PO4)6 · 2H2OOrth. mmm (2/m 2/m 2/m)
19.12.33Dickinsonite-(KMnNa){KNa}{Mn2+◻}{Ca}{Na3}{Mn2+13}{Al}(PO4)12(OH)2Mon. 2/m : B2/b
19.12.34Sarcopside(Fe2+,Mn2+,Mg)3(PO4)2Mon. 2/m : P21/b
19.12.35LudlamiteFe2+3(PO4)2 · 4H2OMon. 2/m : P21/b
19.12.36GraftoniteFe2+Fe2+2(PO4)2Mon. 2/m : P21/b
19.12.37WilhelmvierlingiteCaMnFe3+(PO4)2(OH) · 2H2OOrth.
19.12.38FairfielditeCa2Mn2+(PO4)2 · 2H2OTric. 1 : P1
19.12.39BeusiteMn2+Mn2+2 (PO4)2Mon.
19.12.40MesseliteCa2Fe2+(PO4)2 · 2H2OTric. 1 : P1
19.12.41Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
19.12.42Jahnsite-(CaMnMn){Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
19.12.43Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
19.12.44KeckiteCaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3 · 7H2OMon. 2/m : P2/b
19.12.45StanfielditeCa4Mg5(PO4)6Mon.
19.12.46Laubmannite(Fe2+,Mn2+,Ca)3Fe3+6(PO4)4(OH)12
19.12.47ZodaciteCa4Mn2+Fe3+4(PO4)6(OH)4 · 12H2OMon.
19.12.48HagendorfiteNaCaMn2+Fe2+2(PO4)3Mon. 2/m : B2/b
19.12.49Maghagendorfite(□,Na,)(Na,Ca,Fe2+)Mn(Mg,Fe2+,Fe3+)3(PO4)3Mon.
19.12.50VaruliteNaCaMn2+Mn2+2(PO4)3Mon. 2/m : B2/b
19.12.51GriphiteNa4Li2Ca6(Mn2+,Fe2+,Mg)19Al8(PO4)24(F,OH)8Iso. m3 (2/m 3) : Pa3
19.12.52Attakolite(Ca,Sr)Mn(Al,Fe)4(HPO4,PO4)3(SiO4,PO4)(OH)4Mon. 2/m : B2/m
19.12.53Arrojadite-(KFe){KNa}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)(OH)2Mon.
19.12.54Lun'okite(Mn,Ca)(Mg,Fe,Mn)Al(PO4)2OH · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
19.12.55EosphoriteMn2+Al(PO4)(OH)2 · H2OOrth. mmm (2/m 2/m 2/m) : Cmca
19.12.56Ernstite(Mn2+,Fe3+)Al(PO4)(OH,O)2 · H2OMon.
19.12.57ChildreniteFe2+Al(PO4)(OH)2 · H2OOrth. mm2 : Ccc2
19.12.58BobfergusoniteNa2Mn5FeAl(PO4)6Mon. 2/m : P2/b
19.12.59QingheiiteNaMn3+Mg(Al,Fe3+)(PO4)3Mon. 2/m : P21/b
19.12.60Whiteite-(CaFeMg){Ca}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
19.12.61Whiteite-(CaMnMg){Ca}{Mn2+}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m
19.12.62Whiteite-(MnFeMg){(Mn2+,Ca)}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
19.12.63Rittmannite{(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2 · 8H2OMon.
19.12.64ZanazziiteCa2Mg5Be4(PO4)6(OH)4 · 6H2OMon. 2/m : B2/b
19.12.65Samuelsonite(Ca,Ba)Ca8Fe2+2Mn2+2Al2(PO4)10(OH)2Mon. 2/m : B2/m

Fluorescence of PseudolaueiteHide

Not fluorescent in UV

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 PseudolaueiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1956): 41: 815.
American Mineralogist (1969): 54: 1312-1323.
Moore, P.B. (1975): Laueite, pseudolaueite, stewartite and metavauxite; a study in combinatorial polymorphism. Neues Jahrbuch für Mineralogie, Abhandlungen, 123, 148-159.
Aufschluss (2000): 51: 39-45.

Internet Links for PseudolaueiteHide

Localities for PseudolaueiteHide

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.
Germany (TL)
 
  • Bavaria
    • Upper Palatinate
      • Neustadt an der Waldnaab
        • Waidhaus
          • Hagendorf
Naturwissenschaften,(1956) 43, 128; http://www.berthold-weber.de/h_miner.htm
Dill, H. G., Weber, B., Gerdes, A., & Melcher, F. (2008). The Fe-Mn phosphate apliteSilbergrube'near Waidhaus, Germany: epithermal phosphate mineralization in the Hagendorf-Pleystein pegmatite province. Mineralogical Magazine, 72(5), 1119-1144.
New Zealand
 
  • Tasman Region
    • Glenhope
Stott, F. (pers. notes) Minerals Associated with Phosphate Nodules, Tadmer Dry Weather Road Locality/Micromounting Seminar-Nelson. Both collector articles downloaded to Otago Rock and Minerals Club website (Phosphate nodules were studied by the club, however it is uncertain the level of scientific investigation)
Portugal
 
  • Guarda
    • Sabugal
      • Bendada
Schnorrer-Köhler (1991), Mineral Occurrences.
  • Viseu
    • Mangualde
Rewitzer, C. and Röschl, N. (1984) Portugal. Lapis, 9(12).; van den Berg, W. (1992) Enkele vermaarde mineralenvindplaatsen in Midden-Portugal. Gea, 1992(1), 38-39 (in Dutch).
USA
 
  • California
    • San Diego County
      • Anza-Borrego Desert State Park
        • Elder Canyon
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 312.
  • Maine
    • Oxford County
      • Greenwood
        • Uncle Tom Mountain
Falster, A. U., Simmons, W. B., Webber, K. L., Dallaire, D. A., Nizamoff, J. W., & Sprague, R. A. (2019). The Emmons Pegmatite, Greenwood, Oxford County, Maine. Rocks & Minerals, 94(6), 498-519.
      • Newry
King, V. and Foord, E., 1994, 2000, Mineralogy of Maine, volume 1 and 2, with updates by Van King.
  • New Hampshire
    • Grafton Co.
      • Groton
Am. Min. 50 (1965), 713-717
Rocks & Min., May 1999.
  • North Carolina
    • Cleveland Co.
      • Kings Mountain Mining District
Jason B. Smith (visual identification)
 
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