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Kidwellite

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About KidwelliteHide

Albert Lewis Kidwell
Formula:
NaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33
Formula is slightly simplified; for details see Kolitsch (2004).
Colour:
Greenish yellow, Greenish white, Yellow, Light green
Lustre:
Resinous, Waxy, Silky, Dull
Hardness:
3
Specific Gravity:
3.04 - 3.3
Crystal System:
Monoclinic
Name:
Named by Paul (Paulus) B. Moore and Jum Ito in 1978 in honor of Albert Lewis (or Laws) Kidwell (January 1, 1919 Auxvasse, Missouri, USA - August 16, 2008 Scottsdale, Arizona, USA), mineral collector and research geologist with Carter Oil Company and later Exxon Oil Company, Houston, Texas, USA.
Occurs as replacement of rockbridgeite and beraunite.
Dufrénite or natrodufrénite may overgrow, in an epitaxial way, kidwellite, and vice-versa.

May be confused with meurigite-Na.


Classification of KidwelliteHide

Approved
Approval Year:
1974
7/D.11-140
8.DK.20

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
K : With large and medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1
Dana 7th ed.:
42.8.2.1
42.8.2.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
8 : (AB)5(XO4)3Zq·xH2O
19.14.2

19 : Phosphates
14 : Phosphates of Fe and other metals

Physical Properties of KidwelliteHide

Resinous, Waxy, Silky, Dull
Comment:
Frequently matte botryoids with a fine velvety surface
Colour:
Greenish yellow, Greenish white, Yellow, Light green
Streak:
yellow
Hardness:
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {100}
Fracture:
Splintery
Density:
3.04 - 3.3 g/cm3 (Measured)    3.34 g/cm3 (Calculated)

Optical Data of KidwelliteHide

Type:
Biaxial (-)
RI values:
nα = 1.787 nβ = 1.800 nγ = 1.805
Birefringence:
0.018
Max Birefringence:
δ = 0.018
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
extreme
Pleochroism:
Non-pleochroic

Chemical Properties of KidwelliteHide

Formula:
NaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33

Formula is slightly simplified; for details see Kolitsch (2004).
IMA Formula:
NaFe3+9+x(PO4)6(OH)11 · 3H2O (x ≈ 0.33)

Crystallography of KidwelliteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P2/b
Setting:
P2/c
Cell Parameters:
a = 20.117 Å, b = 5.185 Å, c = 13.978 Å
β = 107.07°
Ratio:
a:b:c = 3.88 : 1 : 2.696
Unit Cell V:
1,393.77 ų (Calculated from Unit Cell)
Morphology:
Usually acicular, but may rarely form almost rod-like crystals.
Comment:
Single-crystal data; slightly As-bearing.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.41 (100)
6.43 (30)
4.017 (35)
3.813 (40)
3.413 (55)
3.193 (40)
3.173 (35)

Type Occurrence of KidwelliteHide

General Appearance of Type Material:
Olive green botryoids or bands within other phosphate mineral botryoids.
Geological Setting of Type Material:
Phosphate-bearing iron deposits
Associated Minerals at Type Locality:

Synonyms of KidwelliteHide

Other Language Names for KidwelliteHide

German:Kidwellit
Spanish:Kidwelita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Strengite69 photos of Kidwellite associated with Strengite on mindat.org.
Beraunite58 photos of Kidwellite associated with Beraunite on mindat.org.
Dufrénite24 photos of Kidwellite associated with Dufrénite on mindat.org.
Rockbridgeite23 photos of Kidwellite associated with Rockbridgeite on mindat.org.
Cacoxenite19 photos of Kidwellite associated with Cacoxenite on mindat.org.
Leucophosphite11 photos of Kidwellite associated with Leucophosphite on mindat.org.
Goethite9 photos of Kidwellite associated with Goethite on mindat.org.
Variscite9 photos of Kidwellite associated with Variscite on mindat.org.
Quartz8 photos of Kidwellite associated with Quartz on mindat.org.
Bariopharmacosiderite7 photos of Kidwellite associated with Bariopharmacosiderite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.DK.RichelsdorfiteCa2Cu5Sb(AsO4)4(OH)6Cl · 6H2OMon. 2/m
8.DK.10BariopharmacosideriteBa0.5Fe3+4(AsO4)3(OH)4 · 5H2OTet. 4 2m : P4 2m
8.DK.10PharmacosideriteKFe3+4(AsO4)3(OH)4 · 6-7H2OIso. 4 3m : P4 3m
8.DK.10Natropharmacosiderite(Na,K)Fe3+4(AsO4)3(OH)4 · 6-7H2OIso. 4 3m : P4 3m
8.DK.10Hydroniumpharmacosiderite(H3O)Fe4(AsO4)3(OH)4 · 4H2OIso. 4 3m : P4 3m
8.DK.12PharmacoalumiteKAl4(AsO4)3(OH)4 · 6.5H2OIso. 4 3m : P4 3m
8.DK.12NatropharmacoalumiteNaAl4(AsO4)3(OH)4 · 4H2OIso. 4 3m : P4 3m
8.DK.12BariopharmacoalumiteBa0.5Al4(AsO4)3(OH)4 · 4H2OIso. 4 3m : P4 3m
8.DK.15BurangaiteNaFe2+Al5(PO4)4(OH)6 · 2H2OMon. 2/m : B2/b
8.DK.15DufréniteCa0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2OMon. 2/m : B2/b
8.DK.15NatrodufréniteNaFe2+Fe3+5(PO4)4(OH)6 · 2H2OMon.
8.DK.15MatioliiteNaMgAl5(PO4)4(OH)6 · 2H2OMon. 2/m : B2/b
8.DK.15GayiteNaMn2+Fe3+5(PO4)4(OH)6 · 2H2OMon. 2/m : B2/b
8.DK.25Bleasdaleite(Ca,Fe3+)2Cu5(Bi,Cu)(PO4)4(H2O,OH,Cl)13Mon.
8.DK.30Matulaite(Fe3+,Al)Al7(PO4)4(PO3OH)2(OH)8(H2O)8 · 8H2OMon.
8.DK.35KrasnoviteBa(Al,Mg)(PO4,CO3)(OH)2 · H2OOrth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.14.1CyriloviteNaFe3+3(PO4)2(OH)4 · 2H2OTet. 4 2 2 : P41 21 2
19.14.3Rosemaryite(Na,Ca,Mn)(Mn,Fe2+)(Fe3+,Mg)Al(PO4)3Mon. 2/m : P21/b
19.14.4Wyllieite(Na,Ca,Mn)(Mn,Fe)(Fe,Mg)Al(PO4)3Mon. 2/m
19.14.5Ferrowyllieite(Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3Mon. 2/m : P21/b
19.14.6NatrodufréniteNaFe2+Fe3+5(PO4)4(OH)6 · 2H2OMon.
19.14.7LeucophosphiteKFe3+2(PO4)2(OH) · 2H2OMon. 2/m : P21/b
19.14.8Spheniscidite(NH4,K)(Fe3+,Al)2(PO4)2(OH) · 2H2OMon.
19.14.9BurangaiteNaFe2+Al5(PO4)4(OH)6 · 2H2OMon. 2/m : B2/b
19.14.10Satterlyite(Fe2+,Mg,Fe)12(PO4)5(PO3OH)(OH,O)6Trig. 3m (3 2/m) : P3 1m
19.14.11UshkoviteMgFe3+2(PO4)2(OH)2 · 8H2OTric.
19.14.12Garyansellite(Mg,Fe)3(PO4)2(OH,O) · 1.5H2OOrth. mmm (2/m 2/m 2/m)
19.14.13ThadeuiteCa(Mg,Fe2+)3(PO4)2(OH,F)2Orth. 2 2 2 : C2 2 21
19.14.14AnapaiteCa2Fe2+(PO4)2 · 4H2OTric. 1 : P1
19.14.15XanthoxeniteCa4Fe3+2(PO4)4(OH)2 · 3H2OTric. 1 : P1
19.14.16CalcioferriteCa2Fe3+2(PO4)3(OH) · 7H2OMon. 2/m : B2/b
19.14.17MitridatiteCa2Fe3+3(PO4)3O2 · 3H2OMon. 2/m : B2/b
19.14.18MélonjosephiteCaFe2+Fe3+(PO4)2(OH)
19.14.19DelvauxiteCaFe4(PO4,SO4)2(OH)8 · 4-6H2O not confirmed · Amor.
19.14.20CollinsiteCa2Mg(PO4)2 · 2H2OTric. 1 : P1
19.14.21SegeleriteCa2 Mg2 Fe3+2(PO4)4(OH)2 · 8H2OOrth. mmm (2/m 2/m 2/m) : Pcca
19.14.22KingsmountiteCa4(Fe2+,Mn2+)Al4(PO4)6(OH)4 · 12H2OMon. 2 : B2
19.14.23VauxiteFe2+Al2(PO4)2(OH)2 · 6H2OTric. 1 : P1
19.14.24MetavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OMon. 2/m : P21/b
19.14.25ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
19.14.26SigloiteFe3+Al2(PO4)2(OH)3 · 7H2OTric.
19.14.27CacoxeniteFe3+24AlO6(PO4)17(OH)12 · 75H2OHex. 6/m : P63/m
19.14.28KoninckiteFe3+PO4 · 3H2OTet.
19.14.29LazuliteMgAl2(PO4)2(OH)2Mon. 2/m : P21/b
19.14.30ScorzaliteFe2+Al2(PO4)2(OH)2Mon. 2/m : P21/b
19.14.31Souzalite(Mg,Fe2+)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2OTric.
19.14.32Gormanite(Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2OTric.
19.14.33ZaïriteBiFe3+3(PO4)2(OH)6Trig. 3m (3 2/m) : R3m

Fluorescence of KidwelliteHide

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 KidwelliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Moore, P.B. & Ito, J. (1978): Kidwellite, NaFe3+9(OH)10(PO4)6*5H2O, a new species. Mineralogical Magazine,42, 137-140.
American Mineralogist (1979): 64: 242-243.
Braithwaite, R.S.W. and Corke, H. (1980) Kidwellite from Cornwall. Mineralogical Magazine, 43, 952-953.
Kolitsch, U. (2004): The crystal structures kidwellite and 'laubmannite', two complex fibrous iron phosphates. Mineralogical Magazine, 68, 147-165.

Internet Links for KidwelliteHide

Localities for KidwelliteHide

ⓘ - 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.
Australia
 
  • New South Wales
    • Yancowinna Co.
      • Broken Hill district
        • Broken Hill
          • Broken Hill South Mine (BHS Mine; South Mine)
Australian Min. 3:1 (1997)
  • South Australia
    • Eyre Peninsula
      • Middleback Range
        • Iron Knob
Min Rec 12:106n, 22:(387); Pilkington, E. S., Segnit, E. R., Watts, J. and Francis, G. (1979): Kleemanite, a new zinc aluminium phosphate. Mineralogical Magazine 43, 93-95.
  • Victoria
    • Buloke Shire
      • Wycheproof
W.D.Birch. Phosphate Minerals of Victoria. The Mineralogical Society of Victoria special publication No. 3 pp. 28-32 W.D.Birch 1996.Portlandite and other recent mineral discoveries in the granite at Lake Boga, Wycheproof and Pyramid Hill, Victoria.Australian Journal of Mineralogy Vol.2 No.2, Dec.1996
    • Swan Hill Rural City
      • Lake Boga
W.D. Birch & D.A.Henry 1993. Phosphate Minerals of Victoria, The Mineralogical Society of Victoria special publication No. 3, pp. 14-27
Brazil
 
  • Minas Gerais
    • Galiléia
      • Sapucaia do Norte
Cassedanne, J.P. & Baptista, A. (1999): Famous Mineral Localities: The Sapucaia Pegmatite Minas Gerais, Brazil. Mineralogical Record, 30: 347-360 + 365
Czech Republic
 
  • Plzeň Region
    • Rokycany (Rokitzan; Rokytzan)
Janouš, F.: Minerály z Kněží hory u Těškova (okres Rokycany), Minerál, 1995, roč. 3, č. 6, s. 367-369.
  • Vysočina Region
    • Pelhřimov District
      • Černovice
Vrtiška L, Sejkora J, Malíková R, Kadlec T (2017) Revize a nové nálezy fosfátů na historickém nalezišti Černovice u Tábora (Česká republika). Bull Mineral Petrolog 25(2)
France
 
  • Auvergne-Rhône-Alpes
    • Allier
      • Ébreuil
        • Échassières
Queneau Patrice collection; Uwe Kolitsch (PXRD analysis)
Chollet Pascal collection
Pierre Le Roch & Jean-Marc Johannet collections
Walenta, K. & Binder, W. (1980): Kidwellit und Dufrenit aus den Mines de Montmins bei Echassiéres (französisches Zentralmassiv). Aufschluss 31, 51-54.; Le Règne Minéral, (33), 5-25.
  • Occitanie
    • Tarn
      • Castelnau-de-Brassac
        • Fumade
Queneau Patrice collection
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Wolfach
        • Oberwolfach
          • Rankach valley
Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German); MinRec 28:141; U. Kolitsch (2004): The crystal structures of kidwellite and 'laubmannite', two complex fibrous iron phosphates. Mineralogical Magazine 68, 147-165.
  • Hesse
    • Limburg
      • Mensfelden
http://taunusmineralien.de/Stbr.Birkenkopf.html
    • Wetzlar
      • Waldgirmes
Weiss: "Mineralfundstellen, Deutschland West", 1990
      • Weilburg
        • Essershausen
Blaß, G. (2002): Eine neue Phosphatmineralien-Paragenese von der Grube Mark bei Essershausen, mittleres Lahngebiet, Taunus. Mineralien-Welt, 13 (6), 18-43. (in German)
  • North Rhine-Westphalia
    • Sauerland
      • Warstein
        • Hirschberg
D. Pawlowski: "Mineralfundstellen im Sauerland", Weise (Munich), 1991
  • Rhineland-Palatinate
    • Ahrweiler
      • Siegerland
        • Herdorf
          • Dermbach
Hucko, S. (2010): Phosphatparagenesen auf Brauneisensteingängen am Windhahn. Mineralien-Welt 21 (2), 14-25.
    • Altenkirchen
      • Bürdenbach
Weiss: "Mineralienfundstellen, Deutschland West", Weise (Munich), 1990
    • Neuwied
      • Dernbach
Belendorff, K. (2012) Neuigkeiten von der Grube Schöne Aussicht bei Dernbach. Mineralienwelt, 23(5), 28-37.
    • Westerwald
      • Bad Marienberg
        • Wildsachsen
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
  • Saxony
    • Görlitz
      • Rengersdorf
T. Witzke & T. Giesler (1997): Neufunde aus Sachsen (VI): Churchit-(Y), Cyrilovit, Faustit, Kidwellit, Meurigit und Nickelhexahydrit aus der Lausitz.- Lapis 22, 9, 36-38
Japan
 
  • Honshu Island
    • Kanto Region
      • Ibaraki Prefecture
        • Kasumigaura City
          • Chiyoda-machi
Matsubara & Kato (1980) Koubutsugaku Zasshi, 14, 269-286.
Mali
 
  • Sikasso Region
Gineste, C. (2012): N'golokasso, une occurrence de phosphates dans le Sud Mali. Le Cahier des Micromonteurs, 3-2012, 110-120
Morocco
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Tazenakht
Favreau, G. (2012): Les minéralisations à phosphates de la pegmatite d'Angarf-Sud (Maroc).Le Cahier des Micromonteurs, 3-2012, 3-70.
Namibia
 
  • Erongo Region
    • Dâures
Von Bezing, L., Bode, R., and Jahn, S., (2008) Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern. 409 (in English).
Der Aufschluss 36:117-119
    • Karibib
      • Okatjimukuju Farm 55 (Friedrichsfelde Farm)
P. Keller and O. von Knorring, Eur. J. Mineral. , 1989, 1, pp. 567-593.
Portugal
 
  • Bragança District
    • Torre de Moncorvo
      • Felgar
Pedro Alves collection
Pedro Alves collection
  • Guarda District
    • Gouveia
Georges Favreau info; Analyses by Nicolas Meisser in Lausanne (EDS + XRD).
desescaut.jy@voila.fr
Spain
 
  • Castile-La Mancha
    • Ciudad Real
      • Minas de Horcajo
Sáinz de Baranda, B., Palero, F.J., García, G. (2004): El Horcajo, las piromorfitas más famosas del mundo. Bocamina, 13, 32-68.
  • Extremadura
    • Cáceres
      • Zarza la Mayor
Viñals, J. and Calvo, M. (2011). Secondary phosphates of La Paloma mine, Zarza la Mayor, Cáceres, Spain. Mineral Up 2 (5), 8-31.
Sweden
 
  • Norrbotten
    • Kiruna
      • Kiruna district
        • Svappavaara
Bjällerud, C.-G. (1989): Phosphate minerals from the Leveäniemi Iron Mine, Svappavaara, Sweden. Mineralogical Record. 20 (5):343-346
UK
 
  • England
    • Cornwall
      • Linkinhorne
        • Minions
Mineralogical Magazine, 43, 952-953; Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
USA
 
  • Alabama
    • Calhoun Co.
Min Rec 1995 26:475-499
    • Cherokee Co.
Henry Barwood
Barwood, H. & Hajek, B. (1978): Notes of Some New Occurences in Alabama. Mineralogical Record. 9: 388-391; Min.Rec.:20(5):361; Rocks & Min.: 64:203.
Mineralogy of Alabama Geol Surv Ala. Bull 120
Rocks & Min 70:5 pp 320-333
  • Arkansas
    • Montgomery Co.
      • Norman
Mineralogical Magazine 1978 42 : 137-140.; Rocks & Minerals: 64: 297.
      • North Mountain
Rocks & Min.: 63:113; 64:294; Sick (1984).
    • Polk Co.
Rocks and Minerals, (1988) 63:104-125
      • Shady
Rocks & Min.:64:297-298.
Rocks and Minerals, (1988) 63:104-125
      • Three Oaks Gap
Rocks & Minerals: 63: 120.
  • Georgia
    • Burke Co.
      • Girard District
Jason Smith & M.E. Ciriotti (2005) [m.ciriotti@tin.it]
  • Nevada
    • Esmeralda Co.
NBMG Spec. Pub. 31 Minerals of Nevada
      • Divide District
NBMG Spec. Pub. 31 Minerals of Nevada
    • Humboldt Co.
      • Iron Point District
        • Valmy
Dr. William S. Wise presentation to Northwest Micro Mineral Study Group on 1 May 2004, Update on Mineralogy of the Silver Coin Mine, Iron Point District, Edna Mountains, Humboldt Co., Nevada
NBMG Spec. Pub. 31 Minerals of Nevada
  • South Dakota
    • Custer Co.
      • Custer District
        • Fourmile
Thomas J. Campbell & Willard L. Roberts (1986) Phosphate Minerals from the Tip Top Mine, Black Hills, South Dakota. Mineralogical Record 17: 237-254.
    • Pennington Co.
      • Keystone District
        • Glendale
Rocks & Minerals: 60: 116.
  • Virginia
    • Rockbridge Co.
Minerals of Virginia, 1990 by R. V. Dietrich
      • Lyndhurst-Vesuvius District
Kearns, L. E. and Penick, D. A. (1989): The Dixie Mine, Rockbridge County, Virginia. Rocks and Minerals, 64, 42-45. (also see Rocks & Min.:57:20-22 & 60:168); Watson(1907).
      • Midvale
        • South Mountain
Rocks & Min.: 57:20 & 60:168.
Mineral and/or Locality  
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