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Cattiite

Big Photo

Zheleznyi Mine (Iron Mine), Kovdor Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
© Thomas Witzke

Formula:
Mg
 
3
(PO
 
4
)
 
2
·22H
 
2
O
System:TriclinicColour:colourless
Hardness:2
Name:for Prof. Michele Catti (born 1945), Italy
This page provides mineralogical data about Cattiite.

Classification of Cattiite

IMA status:Approved 2000
Strunz 8th edition ID:7/C.0-
Nickel-Strunz 10th (pending) edition ID:8.CE.50

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
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Type Occurrence of Cattiite

Type Locality:Zheleznyi Mine (Iron Mine), Kovdor Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
General Appearance of Type Material:small massive aggregates and very small crystals
Year of Discovery:2002
Geological Setting of type material:in a vein of dolomite carbonatite in forsterite-magnetite ore

Physical Properties of Cattiite

Lustre:Adamantine, Pearly
Diaphaneity (Transparency):Transparent
Colour:colourless
Streak:white
Hardness (Mohs):2
Hardness Data:Measured
Cleavage:Perfect
(001)
Fracture:Irregular/Uneven
Density (measured):1.65 g/cm3
Density (calculated):1.64 g/cm3

Crystallography of Cattiite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 6.932Å, b = 6.925Å, c = 16.154Å
α = 82.21°, β = 89.7°, γ = 119.51°
Ratio:a:b:c = 1.001 : 1 : 2.333
Unit Cell Volume:V 666.3 ų
Z:1

Optical Data of Cattiite

Type:Biaxial (-)
RI values: nα = 1.459 nβ = 1.470 nγ = 1.470
Maximum Birefringence:δ = 0.011

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Pleochroism:Non-pleochroic

Chemical Properties of Cattiite

Formula:
Mg
 
3
(PO
 
4
)
 
2
·22H
 
2
O
Essential elements:
All elements listed in formula:H, Mg, O, P

Relationship of Cattiite to other Species

Related Minerals - Nickel-Strunz Grouping):
8.CE.05Chudobaite
(Na,K)(Mg,Zn)
 
2
H(AsO
 
4
)(OH,O)
 
6
8.CE.05Geigerite
Mn
 
5
[HAsO
 
4
|AsO
 
4
]
 
2
 · 10H
 
2
O
8.CE.10Newberyite
MgHPO
 
4
·3H
 
2
O
8.CE.15Brassite
MgHAsO
 
4
·4H
 
2
O
8.CE.20Phosphorrösslerite
MgHPO
 
4
·7H
 
2
O
8.CE.20Rösslerite
MgHAsO
 
4
·7H
 
2
O
8.CE.25Metaswitzerite
Mn
 
3
(PO
 
4
)
 
2
·4H
 
2
O
8.CE.25Switzerite
(Mn,Fe)
 
3
(PO
 
4
)
 
2
·7H
 
2
O
8.CE.30Lindackerite
CuCu
 
4
[HAsO
 
4
|AsO
 
4
]
 
2
 · 8-9H
 
2
O
8.CE.30IMA2005-053
(Zn,Cu,Co)Cu
 
4
[HAsO
 
4
|AsO
 
4
]
 
2
 · 9H
 
2
O
8.CE.30Pradetite
CoCu
 
4
(AsO
 
4
)
 
2
(AsO
 
3
OH)
 
2
·9H
 
2
O
8.CE.35Bobierrite
Mg
 
3
(PO
 
4
)
 
2
·8H
 
2
O
8.CE.40Annabergite
Ni
 
3
(AsO
 
4
)
 
2
·8H
 
2
O
8.CE.40Arupite
Ni
 
3
(PO
 
4
)
 
2
·8H
 
2
O
8.CE.40Barićite
(Mg,Fe)
 
3
(PO
 
4
)
 
2
·8H
 
2
O
8.CE.40Erythrite
Co
 
3
(AsO
 
4
)
 
2
·8H
 
2
O
8.CE.40Ferrisymplesite
Fe
3+
3
[(OH)
 
3
|(AsO
 
4
)
 
2
] · 5H
 
2
O
8.CE.40Hörnesite
Mg
 
3
(AsO
 
4
)
 
2
·8H
 
2
O
8.CE.40Köttigite
Zn
 
3
(AsO
 
4
)
 
2
·8H
 
2
O
8.CE.40Manganohörnesite
(Mn,Mg)
 
3
(AsO
 
4
)
 
2
·8H
 
2
O
8.CE.40Parasymplesite
Fe
2+
3
(AsO
 
4
)
 
2
·8H
 
2
O
8.CE.40Vivianite
Fe
2+
3
(PO
 
4
)
 
2
·8H
 
2
O
8.CE.40Pakhomovskyite
Co
 
3
[PO
 
4
]
 
2
 · 8H
 
2
O
8.CE.45Symplesite
Fe
2+
3
(AsO
 
4
)
 
2
·8H
 
2
O
8.CE.55Koninckite
Fe
3+
 
[PO
 
4
] · 3H
 
2
O
8.CE.60Kaňkite
FeAsO
 
4
·3.5H
 
2
O
8.CE.65Steigerite
AlVO
 
4
·3H
 
2
O
8.CE.70Metaschoderite
Al
 
2
PO
 
4
VO
 
4
·6H
 
2
O
8.CE.70Schoderite
Al
 
2
PO
 
4
VO
 
4
·8H
 
2
O
8.CE.75Mahlmoodite
8.CE.75Malhmoodite
FeZr(PO
 
4
)
 
2
·4H
 
2
O
8.CE.80Santabarbaraite
Fe
3+
3
[(OH)
 
3
|(PO
 
4
)
 
2
] · 5H
 
2
O
8.CE.85Metaköttigite
(Zn,Fe,Fe)
 
3
(AsO
 
4
)
 
2
·8(H
 
2
O,OH)
8.CE.85Metavivianite
Fe
2+
3-x
Fe
3+
x
(PO
 
4
)
 
2
(OH)x·(8-x)H
 
2
O

Other Names for Cattiite

Synonyms:
IMA2000-032
German names:
Cattiit
Russian names:
Каттиит
Spanish names:
Cattiita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Cattiite

Reference List:Britvin, S.N., G. Ferraris, G. Ivaldi, A.N. Bogdanova & N.V. Chukanov (2002) Cattiite, Mg3(PO4)2·22H2O, a new mineral from Zhelezny mine (Kovdor Massif, Kola Peninsula, Russia). Neues Jahrbuch für Mineralogie, Monatshefte 2002: 160-168.

Zeitschrift für Kristallographie: 155: 53-64.

Internet Links for Cattiite

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    Localities for Cattiite

    (TL) indicates type locality. ? 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.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Kovdor Massif
    		S.N. Britvin, G. Ferraris, G. Ivaldi, A.N. Bogdanova & N.V. Chukanov (2002), Neues Jahrbuch für Mineralogie, Monatshefte 2002: 160-168.
    Mineral and/or Locality
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