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Parabrandtite

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About ParabrandtiteHide

Formula:
Ca2Mn2+(AsO4)2 · 2H2O
Colour:
Colourless
Hardness:
3 - 4
Crystal System:
Triclinic
Name:
Named in 1987 by Pete J. Dunn, Donald R. Peacor, Shu-Chun Su, Frederick John Wicks, and Fred J. Parker in allusion to its dimorphous relationship with brandtite.
Fairfieldite Group.
The Mn analogue of Unnamed (Fe2+-analogue of Parabrandtite).

Only 3 co-type specimens exist. The material was discovered by Fred Parker, American collector of Franklin Minerals, and a local mineral dealer in Maryland, in a single flat of specimens purchased from a miner, and submitted by Parker for analysis and identification.


Classification of ParabrandtiteHide

Approved
Approval Year:
1986
8.CG.05

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1
40.2.2.8

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
20.8.15

20 : Arsenates (also arsenates with phosphate, but without other anions)
8 : Arsenates of Mn

Physical Properties of ParabrandtiteHide

Transparency:
Transparent
Colour:
Colourless
Hardness:
3 - 4 on Mohs scale

Optical Data of ParabrandtiteHide

Type:
Biaxial (+)
RI values:
nα = 1.701 nβ = 1.721 nγ = 1.751
2V:
Measured: 79° , Calculated: 80°
Max Birefringence:
δ = 0.050
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v weak

Chemical Properties of ParabrandtiteHide

Formula:
Ca2Mn2+(AsO4)2 · 2H2O

Crystallography of ParabrandtiteHide

Crystal System:
Triclinic
Cell Parameters:
a = 5.89 Å, b = 7.03 Å, c = 5.64 Å
α = 96.77°, β = 109.32°, γ = 108.47°
Ratio:
a:b:c = 0.838 : 1 : 0.802
Unit Cell V:
202.46 ų (Calculated from Unit Cell)
Morphology:
Intergrown, parallel, wedge-shaped crystal aggregates to 1.5 mm.

Type Occurrence of ParabrandtiteHide

General Appearance of Type Material:
Microscopic gtroups of crystals on the surfaces of the fissures.
Geological Setting of Type Material:
Fissures traversing massive willemite-franklinite "red" ore in the Sterling Hill ore body.
Associated Minerals at Type Locality:

Synonyms of ParabrandtiteHide

Other Language Names for ParabrandtiteHide

Relationship of Parabrandtite to other SpeciesHide

Other Members of this group:
CassidyiteCa2Ni(PO4)2 · 2H2OTric.
CollinsiteCa2Mg(PO4)2 · 2H2OTric. 1 : P1
FairfielditeCa2Mn2+(PO4)2 · 2H2OTric. 1 : P1
GaititeCa2Zn(AsO4)2 · 2H2OTric.
MesseliteCa2Fe2+(PO4)2 · 2H2OTric. 1 : P1
NeomesseliteA structural variety of messelite.Tric.
NickeltalmessiteCa2Ni(AsO4)2 · 2H2OTric. 1 : P1
TalmessiteCa2Mg(AsO4)2 · 2H2OTric.
Unnamed (Fe2+-analogue of Parabrandtite)Ca2Fe2+(AsO4)2 · 2H2O
β-RoseliteCa2Co(AsO4)2 · 2H2OTric.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Miguelromeroite1 photo of Parabrandtite associated with Miguelromeroite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.CG.05CassidyiteCa2Ni(PO4)2 · 2H2OTric.
8.CG.05CollinsiteCa2Mg(PO4)2 · 2H2OTric. 1 : P1
8.CG.05FairfielditeCa2Mn2+(PO4)2 · 2H2OTric. 1 : P1
8.CG.05GaititeCa2Zn(AsO4)2 · 2H2OTric.
8.CG.05MesseliteCa2Fe2+(PO4)2 · 2H2OTric. 1 : P1
8.CG.05β-RoseliteCa2Co(AsO4)2 · 2H2OTric.
8.CG.05TalmessiteCa2Mg(AsO4)2 · 2H2OTric.
8.CG.05HilliteCa2(Zn,Mg)(PO4)2 · 2 H2OTric. 1 : P1
8.CG.10BrandtiteCa2(Mn2+,Mg)(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10WendwilsoniteCa2Mg(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10ZincroseliteCa2Zn(AsO4)2 · 2H2OMon.
8.CG.10RruffiteCa2Cu(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.15FerrilotharmeyeriteCa(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)Mon. 2/m : B2/m
8.CG.15LotharmeyeriteCa(Zn,Mn3+)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
8.CG.15MawbyitePb(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)Mon.
8.CG.15MounanaitePbFe3+2(VO4)2(OH,F)2Mon. 2/m : B2/m
8.CG.15ThometzekitePbCu2+2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15TsumcoritePbZn2(AsO4)2 · 2H2OMon.
8.CG.15CobaltlotharmeyeriteCa(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
8.CG.15CabalzariteCa(Mg,Al,Fe3+)2(AsO4)2(OH,H2O)2Mon. 2/m : B2/m
8.CG.15KrettnichitePbMn3+2(VO4)2(OH)2Mon. 2/m : B2/m
8.CG.15CobalttsumcoritePb(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
8.CG.15NickellotharmeyeriteCa(Ni,Fe3+,Co)2(AsO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
8.CG.15ManganlotharmeyeriteCaMn3+2(AsO4)2(OH)2Mon. 2/m : B2/m
8.CG.15Schneebergite(Bi3+,Ca)(Co,Ni,Fe3+)2(AsO4)2(OH,H2O)2Mon. 2/m : B2/m
8.CG.15Nickelschneebergite(Bi3+,Ca)(Ni,Co,Fe3+)2(AsO4)2 · 2(OH,H2O)Mon. 2/m : B2/m
8.CG.20GartrellitePb(Cu,Fe3+,Zn)2(AsO4,SO4)2 · 2(H2O,OH)Tric. 1 : P1
8.CG.20HelmutwinkleritePb(Zn,Cu)2(AsO4)2 · 2H2OTric.
8.CG.20ZincgartrellitePb(Zn,Fe3+,Cu)2(AsO4)2 · 2(H2O,OH)Tric. 1 : P1
8.CG.20RappolditePb(Co,Ni,Zn)2(AsO4)2 · 2H2OTric.
8.CG.20PhosphogartrellitePb(Cu,Fe3+)2(PO4,AsO4)2 · 2(H2O,OH)Tric.
8.CG.20LukrahniteCa(Cu,Zn)(Fe3+,Zn)(AsO4)2 · 2(H2O,OH)Tric. 1 : P1
8.CG.25Pottsite(Pb3xBi4-2x)(VO4)4·H2O (0.8 < x < 1.0)Tet. 4/m : I41/a
8.CG.35NickeltalmessiteCa2Ni(AsO4)2 · 2H2OTric. 1 : P1

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

40.2.2.1FairfielditeCa2Mn2+(PO4)2 · 2H2OTric. 1 : P1
40.2.2.2MesseliteCa2Fe2+(PO4)2 · 2H2OTric. 1 : P1
40.2.2.3CollinsiteCa2Mg(PO4)2 · 2H2OTric. 1 : P1
40.2.2.4CassidyiteCa2Ni(PO4)2 · 2H2OTric.
40.2.2.5TalmessiteCa2Mg(AsO4)2 · 2H2OTric.
40.2.2.6GaititeCa2Zn(AsO4)2 · 2H2OTric.
40.2.2.7β-RoseliteCa2Co(AsO4)2 · 2H2OTric.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.8.1SarkiniteMn2+2(AsO4)(OH)Mon. 2/m : P2/m
20.8.2EveiteMn2+2(AsO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnnm
20.8.3ArsenoclasiteMn2+5(AsO4)2(OH)4Orth.
20.8.4FlinkiteMn2+2Mn3+(AsO4)(OH)4Orth.
20.8.5JarosewichiteMn2+3Mn3+(AsO4)(OH)6Orth. 2 2 2
20.8.6AllactiteMn2+7(AsO4)2(OH)8Mon. 2/m : P21/b
20.8.7KrautiteMn(HAsO4) · H2OMon. 2 : P21
20.8.8SynadelphiteMn2+9(As5+O4)2(As3+O3)(OH)9 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnma
20.8.9SterlinghilliteMn3(AsO4)2 · 4H2OTric. 1 : P1
20.8.10GeigeriteMn2+5(AsO4)2(HAsO4)2 · 10H2OTric.
20.8.11Akrochordite(Mn2+,Mg)5(AsO4)2(OH)4 · 4H2OMon. 2/m : P21/b
20.8.12Manganohörnesite(Mn,Mg)3(AsO4)2 · 8H2OMon. 2/m : P2/m
20.8.13FluckiteCaMn2+(HAsO4)2 · 2H2OTric. 1 : P1
20.8.14BrandtiteCa2(Mn2+,Mg)(AsO4)2 · 2H2OMon. 2/m : P21/b
20.8.16WallkilldelliteCa2Mn2+3(AsO4)2(OH)4 · 9H2OHex.
20.8.17Berzeliite(NaCa2)Mg2(AsO4)3Iso. m3m (4/m 3 2/m) : Ia3d
20.8.18ManganberzeliiteNaCa2Mn2+2(AsO4)3Iso. m3m (4/m 3 2/m) : Ia3d
20.8.19Magnesiochlorophoenicite(Mg,Mn)3Zn2(AsO4)(OH,O)6Mon. 2/m : B2/m
20.8.20VillyaelleniteMnMn2Ca2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
20.8.21Hematolite(Mn,Mg,Al,Fe3+)15(As5+O4)2(As3+O3)(OH)23Trig. 3 : R3
20.8.22GrischuniteNaCa2Mn2+5Fe3+(AsO4)6 · 2H2OOrth.

Fluorescence of ParabrandtiteHide

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 ParabrandtiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Dunn, P.J., et al (1987), Neues Jahrbuch für Mineralogie, Monatshefte: 2: 113-119.
American Mineralogist (1988): 73: 1496.
Dunn, Pete J. (1995): Franklin and Sterling Hill New Jersey: the world's most magnificent mineral deposits, part 5: 675.

Internet Links for ParabrandtiteHide

Localities for ParabrandtiteHide

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
 
  • Honshu Island
    • Tohoku Region
      • Fukushima Prefecture
        • Iwaki City
Alfredo Petrov collection (named parabrandtite on original japanese label, but no analytical data presented). Feb. 2010: Single crystal XRD identification, G. Giester & F. Neuhold
USA (TL)
 
  • New Jersey
    • Sussex Co.
      • Franklin mining district
        • Ogdensburg
          • Sterling Hill
Dunn, P.J., et al: Neues Jahrbuch für Min. Abhandlungen:157:113-119 (1987); Dunn(1995):Pt5:675.
Mineral and/or Locality  
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