Rhabdophane-(Nd)
A valid IMA mineral species - grandfathered
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About Rhabdophane-(Nd)
Formula:
Nd(PO4) · H2O
Nd is almost always replaced by major to minor La and Ce.
Colour:
Brown, pinkish, yellowish-white, colourless
Hardness:
3½
Crystal System:
Hexagonal
Member of:
Name:
Originally called simply rhabdophane, from the Greek, rhabdos, a rod, plus phainesthai, to appear, in allusion to the bands characteristically exhibited in its spectrum. In 1966 the suffix/modifier was added to differentiate it from cerium dominant rhabdophane. The modifier "-(Nd)" indicates the predominance of Nd over other REE in this species.
This page provides mineralogical data about Rhabdophane-(Nd).
Unique Identifiers
Mindat ID:
3399
Long-form identifier:
mindat:1:1:3399:8
Similar Names
| Rhabdophane | A synonym | |
| Rhabdophane-(Ce) | A valid IMA mineral species | Ce(PO4) · 0.6H2O |
| Rhabdophane-(La) | A valid IMA mineral species | La(PO4) · H2O |
| Rhabdophane-(Pb) | A synonym of 'Lead-bearing Rhabdophane-(Ce)' | |
| Rhabdophane-(Y) | A valid IMA mineral species | YPO4 · H2O |
IMA Classification of Rhabdophane-(Nd)
Approved, 'Grandfathered' (first described prior to 1959)
IMA status notes:
Renamed by the IMA
IMA Formula:
NdPO4·H2O
First published:
1957
Classification of Rhabdophane-(Nd)
8.CJ.45
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
19.9.8
19 : Phosphates
9 : Phosphates of rare earths and Sc
19 : Phosphates
9 : Phosphates of rare earths and Sc
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Rha-Nd | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Rhabdophane-(Nd)
Colour:
Brown, pinkish, yellowish-white, colourless
Hardness:
3½ on Mohs scale
Chemistry of Rhabdophane-(Nd)
Mindat Formula:
Nd(PO4) · H2O
Nd is almost always replaced by major to minor La and Ce.
Nd is almost always replaced by major to minor La and Ce.
Element Weights:
Elements listed:
Crystallography of Rhabdophane-(Nd)
Crystal System:
Hexagonal
Class (H-M):
622 - Trapezohedral
Space Group:
P6222
Cell Parameters:
a = 6.960 Å, c = 6.372 Å
Ratio:
a:c = 1 : 0.916
Unit Cell V:
267.32 ų (Calculated from Unit Cell)
Z:
3
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.07 Å | (m) |
| 4.40 Å | (s) |
| 3.49 Å | (m) |
| 3.02 Å | (vsb) |
| 2.83 Å | (s) |
| 2.15 Å | (s) |
| 1.859 Å | (m) |
Comments:
Sample from Salisbury, Connecticut, USA.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Rhabdophane-(Nd)
Place of Conservation of Type Material:
No designated type material.
Synonyms of Rhabdophane-(Nd)
Rhabdophane (in part)
Scovillite (in part)
Other Language Names for Rhabdophane-(Nd)
Relationship of Rhabdophane-(Nd) to other Species
Member of:
Other Members of Rhabdophane Group:
| Brockite | (Ca,Th,Ce)PO4 · H2O | Hex. 622 : P6222 |
| Grayite | (Th,Pb,Ca)(PO4) · H2O | Hex. 622 : P6222 |
| Rhabdophane-(Ce) | Ce(PO4) · 0.6H2O | Trig. 32 : P3121 |
| Rhabdophane-(La) | La(PO4) · H2O | Hex. 622 : P6222 |
| Rhabdophane-(Y) | YPO4 · H2O | Hex. 622 : P6222 |
| Tristramite | (Ca,U4+,Fe3+)(PO4,SO4) · 2H2O | Hex. 622 : P6222 |
| 'UM1993-07-PO:CaCeHLa' | (Ca,Ce,La,REE)PO4 · nH2O | Hex. 622 : P6222 |
Common Associates
Associations Based on Photo Data:
| 11 photos of Rhabdophane-(Nd) associated with Rhabdophane-(La) | La(PO4) · H2O |
| 8 photos of Rhabdophane-(Nd) associated with Churchite-(Y) | Y(PO4) · 2H2O |
| 7 photos of Rhabdophane-(Nd) associated with Goethite | Fe3+O(OH) |
| 2 photos of Rhabdophane-(Nd) associated with Quartz | SiO2 |
| 1 photo of Rhabdophane-(Nd) associated with Torbernite | Cu(UO2)2(PO4)2 · 12H2O |
Related Minerals - Strunz-mindat Grouping
| 8.CJ. | Airdite | Sr(V4+O)2(PO4)2 · 4H2O |
| 8.CJ. | Dobšináite | Ca2Ca(AsO4)2 · 2H2O |
| 8.CJ. | Sainfeldite | Ca5(AsO4)2(AsO3OH)2 · 4H2O |
| 8.CJ. | Caesiumpharmacosiderite | CsFe3+4[(AsO4)3(OH)4] · 4H2O |
| 8.CJ. | Jeankempite | Ca5(AsO4)2(HAsO4)2 · 7H2O |
| 8.CJ.05 | Stercorite | (NH4)Na(PO3OH) · 4H2O |
| 8.CJ.10 | Swaknoite | (NH4)2Ca(PO3OH)2 · H2O |
| 8.CJ.10 | Mundrabillaite | (NH4)2Ca(PO3OH)2 · H2O |
| 8.CJ.15 | Nabaphite | NaBaPO4 · 9H2O |
| 8.CJ.15 | Nastrophite | Na(Sr,Ba)PO4 · 9H2O |
| 8.CJ.20 | Haidingerite | CaHAsO4 · H2O |
| 8.CJ.25 | Rhabdophane-(Y) | YPO4 · H2O |
| 8.CJ.25 | Vladimirite | Ca4(AsO4)2(AsO3OH) · 4H2O |
| 8.CJ.27 | 'Churchite-(Dy)' | (Dy,Sm,Gd,Nd)PO4 · 2H2O |
| 8.CJ.30 | Ferrarisite | Ca5(AsO4)2(HAsO4)2 · 9H2O |
| 8.CJ.35 | Fulbrightite | Ca(V4+O)2(As5+O4)2 · 4H2O |
| 8.CJ.35 | Machatschkiite | (Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2O |
| 8.CJ.40 | Rauenthalite | Ca3(AsO4)2 · 10H2O |
| 8.CJ.40 | Phaunouxite | Ca3(AsO4)2 · 11H2O |
| 8.CJ.45 | Brockite | (Ca,Th,Ce)PO4 · H2O |
| 8.CJ.45 | Smirnovskite | (Th,Ca)PO4 · nH2O |
| 8.CJ.45 | Rhabdophane-(Ce) | Ce(PO4) · 0.6H2O |
| 8.CJ.45 | Rhabdophane-(La) | La(PO4) · H2O |
| 8.CJ.45 | Tristramite | (Ca,U4+,Fe3+)(PO4,SO4) · 2H2O |
| 8.CJ.45 | Grayite | (Th,Pb,Ca)(PO4) · H2O |
| 8.CJ.45 | Štěpite | U(AsO3OH)2 · 4H2O |
| 8.CJ.47 | Vysokýite | U4+[AsO2(OH)2]4 · 4H2O |
| 8.CJ.50 | Churchite-(Y) | Y(PO4) · 2H2O |
| 8.CJ.50 | Brushite | Ca(PO3OH) · 2H2O |
| 8.CJ.50 | Ardealite | Ca2(PO3OH)(SO4) · 4H2O |
| 8.CJ.50 | Pharmacolite | Ca(HAsO4) · 2H2O |
| 8.CJ.50 | 'Churchite-(Nd)' | Nd(PO4) · 2H2O |
| 8.CJ.55 | Mcnearite | NaCa5(AsO4)(HAsO4)4 · 4H2O |
| 8.CJ.60 | Dorfmanite | Na2(PO3OH) · 2H2O |
| 8.CJ.65 | Sincosite | Ca(V4+O)2(PO4)2 · 4H2O |
| 8.CJ.65 | Bariosincosite | Ba(V4+O)2(PO4)2 · 4H2O |
| 8.CJ.70 | Catalanoite | Na2(PO3OH) · 8H2O |
| 8.CJ.75 | Guérinite | Ca6(HAsO4)3(AsO4)2 · 10.5H2O |
| 8.CJ.85 | Ningyoite | (U,Ca,Ce)2(PO4)2 · 1-2H2O |
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.
Internet Links for Rhabdophane-(Nd)
mindat.org URL:
https://www.mindat.org/min-3399.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Rhabdophane-(Nd)
Reference List:
Muto, T., Meyrowitz, R., Pommer, A. M., Murano, T. (1959) Ningyoite, a new uranous phosphate from Japan. American Mineralogist, 44 (5-6) 633-650
Levinson, A. A. (1966) A system of nomenclature for rare-earth minerals. American Mineralogist, 51 (1-2) 152-158
Localities for Rhabdophane-(Nd)
Showing 21 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Afghanistan | |
| Brandstätter et al. (2000) |
Angola | |
| Beleque (2010) |
Czech Republic | |
| Scharm +7 other references |
Germany | |
| [Wittern (1995) |
| Walenta (1992) +1 other reference |
| Lorenz et al. (2007) |
| Belendorff (2009) |
| Witzke et al. (2025) |
Italy | |
| Bracco et al. (2012) |
Japan | |
| Minakawa (1988) |
| 皆川鉄雄 et al. (2001) |
| TAKAI et al. (2012) |
Madagascar | |
| Wolfgang Hampel (2011) |
Malawi | |
| |
Poland | |
| Pieczka et al. (2024) +1 other reference |
Russia | |
| ... |
| Chukanov et al. (2005) |
UK | |
| Rudler (1905) |
| Bowles et al. (1984) +1 other reference |
USA (TL) | |
| Brush et al. (1883) |
| Hanson et al. (1999) |
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Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany