Malhmoodite
This page is currently not sponsored. Click here to sponsor this page.
About Malhmoodite
Formula:
FeZr(PO4)2 · 4H2O
Colour:
Creamy-white
Lustre:
Silky
Hardness:
3
Specific Gravity:
2.877 (Calculated)
Crystal System:
Monoclinic
Name:
For Bertha K. Malhmood, for many years Administrative Assistant of the Branch of Analytical Laboratories, U.S. Geological Survey.
Note: In the original description, the mineral name was erroneously written "mahlmoodite". This was later amended by the IMA to the correct name malhmoodite.
Note: In the original description, the mineral name was erroneously written "mahlmoodite". This was later amended by the IMA to the correct name malhmoodite.
Classification of Malhmoodite
Approved
7/C.09-35
8.CE.75
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
40.1.5.1
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
1 : AB(XO4)·xH2O
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
1 : AB(XO4)·xH2O
Physical Properties of Malhmoodite
Optical Data of Malhmoodite
Type:
Biaxial (-)
RI values:
nα = 1.640 nβ = 1.652 nγ = 1.652
Max Birefringence:
δ = 0.012
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively weak
Chemical Properties of Malhmoodite
Formula:
FeZr(PO4)2 · 4H2O
IMA Formula:
Fe2+Zr(PO4)2 · 4H2O
Crystallography of Malhmoodite
Crystal System:
Monoclinic
Cell Parameters:
a = 9.12 Å, b = 5.42 Å, c = 19.17 Å
β = 94.81°
β = 94.81°
Ratio:
a:b:c = 1.683 : 1 : 3.537
Unit Cell V:
944.24 ų (Calculated from Unit Cell)
Morphology:
Spherules of radiating fibers
Type Occurrence of Malhmoodite
Synonyms of Malhmoodite
Other Language Names for Malhmoodite
German:Mahlmoodit
Spanish:Mahlmoodita
Related Minerals - Nickel-Strunz Grouping
| 8.CE.X | Babánekite | Cu3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
| 8.CE.05 | Chudobaite | (Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2O | Tric. |
| 8.CE.05 | Geigerite | Mn2+5(AsO4)2(HAsO4)2 · 10H2O | Tric. |
| 8.CE.10 | Newberyite | Mg(HPO4) · 3H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
| 8.CE.15 | Brassite | Mg(HAsO4) · 4H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
| 8.CE.20 | Phosphorrösslerite | Mg(HPO4) · 7H2O | Mon. 2/m : P2/b |
| 8.CE.20 | Rößlerite | Mg(HAsO4) · 7H2O | Mon. 2/m : B2/b |
| 8.CE.25 | Metaswitzerite | Mn2+3(PO4)2 · 4H2O | Mon. 2/m : P2/b |
| 8.CE.25 | Switzerite | (Mn,Fe)3(PO4)2 · 7H2O | Mon. |
| 8.CE.30 | Lindackerite | CuCu4(AsO4)2(HAsO4)2 · 9H2O | Tric. 1 : P1 |
| 8.CE.30 | Ondrušite | CaCu4(AsO4)2(HAsO4)2 · 10H2O | Tric. 1 : P1 |
| 8.CE.30 | Veselovskýite | ZnCu4(AsO4)2(HAsO4)2 · 9H2O | Tric. 1 : P1 |
| 8.CE.30 | Pradetite | CoCu4(AsO4)2(HAsO4)2 · 9H2O | Tric. 1 : P1 |
| 8.CE.30 | Klajite | MnCu4(AsO4)2(HAsO4)2 · 9-10H2O | Tric. 1 : P1 |
| 8.CE.35 | Bobierrite | Mg3(PO4)2 · 8H2O | Mon. 2/m : B2/b |
| 8.CE.40 | Annabergite | Ni3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
| 8.CE.40 | Arupite | Ni3(PO4)2 · 8H2O | Mon. 2/m : B2/m |
| 8.CE.40 | Barićite | (Mg,Fe)3(PO4)2 · 8H2O | Mon. 2/m : B2/m |
| 8.CE.40 | Erythrite | Co3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
| 8.CE.40 | Ferrisymplesite | Fe3+3(AsO4)2(OH)3 · 5H2O | |
| 8.CE.40 | Hörnesite | Mg3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
| 8.CE.40 | Köttigite | Zn3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
| 8.CE.40 | Manganohörnesite | (Mn,Mg)3(AsO4)2 · 8H2O | Mon. 2/m : P2/m |
| 8.CE.40 | Parasymplesite | Fe2+3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
| 8.CE.40 | Vivianite | Fe2+3(PO4)2 · 8H2O | Mon. 2/m : B2/m |
| 8.CE.40 | Pakhomovskyite | Co3(PO4)2 · 8H2O | Mon. 2/m : B2/m |
| 8.CE.45 | Symplesite | Fe2+3(AsO4)2 · 8H2O | Tric. 1 : P1 |
| 8.CE.50 | Cattiite | Mg3(PO4)2 · 22H2O | Tric. 1 : P1 |
| 8.CE.55 | Koninckite | Fe3+PO4 · 3H2O | Tet. |
| 8.CE.60 | Kaňkite | FeAsO4 · 3.5H2O | Mon. |
| 8.CE.65 | Steigerite | Al(VO4) · 3H2O | Mon. 2/m : P21/m |
| 8.CE.70 | Metaschoderite | Al2(PO4)(VO4) · 6H2O | Mon. 2/m : P2/m |
| 8.CE.70 | Schoderite | Al2(PO4)(VO4) · 8H2O | Mon. |
| 8.CE.75 | Zigrasite | MgZr(PO4)2 · 4H2O | Tric. 1 : P1 |
| 8.CE.75 | Unnamed (Ca-analogue of Zigrasite) | CaZr[PO4]2 · 4H2O | Tric. |
| 8.CE.80 | Santabarbaraite | Fe3+3(PO4)2(OH)3 · 5H2O | Amor. |
| 8.CE.85 | Metaköttigite | (Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH) | Tric. 1 : P1 |
Related Minerals - Dana Grouping (8th Ed.)
| 40.1.5.2 | Zigrasite | MgZr(PO4)2 · 4H2O | Tric. 1 : P1 |
| 40.1.5.3 | Unnamed (Ca-analogue of Zigrasite) | CaZr[PO4]2 · 4H2O | Tric. |
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.
References for Malhmoodite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Milton, C., McGee, J. J. and Evans, H. T., jr. (1993): Mahlmoodite, FeZr(PO4)2.4H2O, a new iron zirconium phosphate mineral from Wilson Springs, Arkansas. American Mineralogist 78, 437-440.
New Minerals (1997), New Minerals 1990-1994.
Internet Links for Malhmoodite
mindat.org URL:
https://www.mindat.org/min-2544.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
Localities for Malhmoodite
ⓘ - 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.
- 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.
Belgium | |
| BLONDIEAU M., PUCCIO S., COMPERE P., HATERT F. (2017) - Données nouvelles sur quelques espèces minérales de Vielsalm et de Salmchâteau. Bulletin de la Société Royale des Sciences de Liège, Vol. 86, p. 1 - 48 |
| BLONDIEAU M., PUCCIO S., COMPERE P., HATERT F. (2017) - Données nouvelles sur quelques espèces minérales de Vielsalm et de Salmchâteau. Bulletin de la Société Royale des Sciences de Liège, Vol. 86, p. 1 - 48 |
UK | |
| BMS Database |
USA (TL) | |
| American Mineralogist, Volume 78, pages 437-440, 1993; Smith, Art, Collecting Arkansas Minerals; Rocks & Min. (1995): 70: 154-170. |
| R&M 70:3 pp 154-170 |
North Wilson pit, Union Carbide Mine, Wilson Springs, Garland Co., Arkansas, USA