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LaPO4 · H2O
Brown, pinkish, ...
From the Greek, rhabdos, a rod, plus phainesthai, to appear, in allusion to the bands characteristically exhibited in its spectrum, plus the suffix "-(La)" indicating the dominance of La over other REE in this species.

Classification of Rhabdophane-(La)


C : Phosphates without additional anions, with H2O
J : With only large cations

4 : (AB)5(XO4)2·xH2O

19 : Phosphates
9 : Phosphates of rare earths and Sc

Physical Properties of Rhabdophane-(La)

Brown, pinkish, yellowish-white
Hardness (Mohs):

Optical Data of Rhabdophane-(La)

Uniaxial (+)
RI values:
nω = 1.654 nε = 1.703
Max Birefringence:
δ = 0.049
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of Rhabdophane-(La)

IMA Formula:
LaPO4 · H2O
Elements listed in formula:

Crystallography of Rhabdophane-(La)

Crystal System:

Type Occurrence of Rhabdophane-(La)

General Appearance of Type Material:
Geological Setting of Type Material:
Limonitic iron ore deposit.
Associated Minerals at Type Locality:

Relationship of Rhabdophane-(La) to other Species

Other Members of Group:
Brockite(Ca,Th,Ce)PO4 · H2O
Rhabdophane-(Ce)(Ce,La)(PO4) · H2O
Rhabdophane-(Nd)(Nd,Ce,La)(PO4) · H2O
Tristramite(Ca,U,Fe)(PO4,SO4) · 2H2O
8.CJ.05Stercorite(NH4)Na(PO3OH) · 4H2O
8.CJ.10Mundrabillaite(NH4)2Ca(PO3OH)2 · H2O
8.CJ.10Swaknoite(NH4)2Ca(PO3OH)2 · H2O
8.CJ.15NabaphiteNaBaPO4 · 9H2O
8.CJ.15NastrophiteNaSrPO4 · 9H2O
8.CJ.20HaidingeriteCa(AsO3OH) · H2O
8.CJ.25VladimiriteCa4(AsO4)2(AsO3OH) · 4H2O
8.CJ.30FerrarisiteCa5(AsO3OH)2(AsO4)2 · 9H2O
8.CJ.35MachatschkiiteCa6(AsO4)(AsO3OH)3PO4 · 15H2O
8.CJ.40PhaunouxiteCa3(AsO4)2 · 11H2O
8.CJ.40RauenthaliteCa3(AsO4)2 · 10H2O
8.CJ.45Brockite(Ca,Th,Ce)PO4 · H2O
8.CJ.45Grayite(Th,Pb,Ca)PO4 · H2O
8.CJ.45Rhabdophane-(Ce)CePO4 · H2O
8.CJ.45Rhabdophane-(Nd)NdPO4 · H2O
8.CJ.45Tristramite(Ca,U4+,Fe3+)(PO4,SO4) · 2H2O
8.CJ.45Smirnovskite(Th,Ca)PO4 · nH2O
8.CJ.50ArdealiteCa2(PO3OH)(SO4) · 4H2O
8.CJ.50BrushiteCa(PO3OH) · 2H2O
8.CJ.50Churchite-(Y)YPO4 · 2H2O
8.CJ.50PharmacoliteCa(AsO3OH) · 2H2O
8.CJ.50Churchite-(Nd)Nd(PO4) · 2H2O
8.CJ.55McneariteNaCa5(AsO4)(AsO3OH)4 · 4H2O
8.CJ.60DorfmaniteNa2(PO3OH) · 2H2O
8.CJ.65SincositeCa(V4+O)2(PO4)2 · 4H2O
8.CJ.65BariosincositeBa(VO)2(PO4)2 · 4H2O
8.CJ.70CatalanoiteNa2HPO4 · 8H2O
8.CJ.75GuériniteCa5(AsO3OH)2(AsO4)2 · 9H2O
8.CJ.85Ningyoite(U,Ca,Ce)2(PO4)2 · 1-2H2O
19.9.2Churchite-(Y)YPO4 · 2H2O
19.9.6Rhabdophane-(Ce)CePO4 · H2O
19.9.8Rhabdophane-(Nd)NdPO4 · H2O
19.9.13KolbeckiteScPO4 · 2H2O

Other Names for Rhabdophane-(La)

Name in Other Languages:

Other Information

Other Information:
Readily soluble in HCl.
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 Rhabdophane-(La)

Reference List:
Brush and Penfield (1883) American Journal of Science: 25: 459 (as Scovillite).

Brush and Penfield (1884) American Journal of Science: 27: 200 (as Scovillite).

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 774 (as Scovillite).

Mineralogical Magazine (1984): 48: 146.

Internet Links for Rhabdophane-(La) URL:
Please feel free to link to this page.

Localities for Rhabdophane-(La)

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.
(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.
  • Bahia
    • Novo Horizonte
      • Tapera
Menezes Filho, Luiz A.D. (2016)
  • Bujumbura Rural Province
Van Wambeke, L. (1977): The Karonge rare earth deposits, Republic of Burundi: New mineralogical-geochemical data and origin of the mineralization. Mineralium Deposita. 12 (3), 373-380
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
HORVÁTH, L., PFENNINGER-HORVÁTH, E. (2000) I minerali di Mont-Saint-Hilaire (Québec, Canada) Rivista Mineralogica Italiana, XXIV, 140-202 (in Italian with English summary).
  • Jiangxi Province
    • Ganzhou Prefecture
Zhang Peishan, Yang Zhuming, Tao Kejie, and Yang Xueming (1996): "Mineralogy and Geology of Rare Earths in China", Science Press (Beijing), 226 pp.
  • Baden-Württemberg
    • Black Forest
      • Gengenbach
        • Haigerach valley
Wittern: "Mineralfundorte in Deutschland", 2001
      • Wolfach
        • Oberwolfach
          • Rankach valley
U. Kolitsch, J. Gröbner, F. Brandstätter and R. Bayerl (2010): Neufunde aus der Grube Clara im mittleren Schwarzwald (IV): Calcioandyrobertsit, Cotunnit, Gerhardtit, Khaidarkanit, Lukrahnit, Mckinstryit, Moolooit, Rhabdophan-(La), Rouait und Uricit. Lapis 35 (9), 22-27; 62 (in German).
  • Lower Saxony
    • Harz
      • Bad Lauterberg
Gröbner, J. & Kloss, D. (2010): Neufunde von der Grube Wolkenhügel bei Bad Lauterberg im Harz. Lapis 35 (1), 39-41; 62.
  • Kyushu Region
    • Saga Prefecture
      • Higashimatsuura-gun
        • Genkai-cho
Takai, Y. and Uehara, S. (2012) Rhabdophane-(Y), YPO4·H2O, a new mineral in alkali olivine basalt from Hinodematsu, Genkai-cho, Saga Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 107, 110-113.
  • Zomba District
American Mineralogist, Volume 94, pages 1216–1222, 2009
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Lovozero Massif
  • Connecticut
    • Litchfield Co.
      • Salisbury
        • Salisbury District
Brush, George J. and Samuel L. Penfield. (1883), Scovillite: A New Phosphate of Didymium, Yttrium and other Rare Earths, From Salisbury, Connecticut. American Journal of Science: 25: 459.
  • Wisconsin
    • Marathon Co.
      • Wausau Intrusive Complex
Hanson, S.L., et al (1999) Rocks and Minerals, 74, 184
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