Mindat Logo
Home Page Log In Messageboard The Mindat Directory
Register Search Pages Mineral Chatroom The Mindat Store

Pakhomovskyite

This page is currently not sponsored. Click here to sponsor this page.
Big Photo

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




Formula:
Co
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
System:MonoclinicColour:Bright pink
Hardness:2
Member of:Vivianite Group
Name:Named for Yakov A. Pakhomovsky (1948-), who made significant contributions to the mineralogy of the alkaline massifs of the Kola Peninsula
This page provides mineralogical data about Pakhomovskyite.

Classification of Pakhomovskyite

IMA status:Approved 2004
Strunz 8th edition ID:7/C.13-42
Nickel-Strunz 10th (pending) edition ID:8.CE.40

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
mindat.org URL:http://www.mindat.org/min-27472.html
Please feel free to link to this page.

Type Occurrence of Pakhomovskyite

Type Locality:Kovdor Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
General Appearance of Type Material:groups (up to 3 x 3 x 2 cm) of small spherulites (up to 0.5 mm diameter) and rosettes (up to 0.05 mm diameter) of tabular crystals, growing on walls of leached fissures in dolomitic carbonatite
Geological Setting of type material:dolomite carbonatite cutting phosphorites
Associated Minerals at type locality:
RimkorolgitePyrrhotitePyritePhlogopiteNorsethite
MagnetiteKovdorskiteJuonniiteChalcopyriteBobierrite
Bakhchisaraitsevite

Physical Properties of Pakhomovskyite

Lustre:Pearly, Dull
Diaphaneity (Transparency):Translucent
Colour:Bright pink
Streak:Pink
Hardness (Mohs):2
Tenacity:Elastic
Cleavage:Perfect
on {010}
Fracture:Step-Like
Density (measured):2.71 g/cm3
Density (calculated):2.71 g/cm3

Crystallography of Pakhomovskyite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m {B1 1 2/m} {C2/m} {C1 2/m 1}
Cell Parameters:a = 10.034Å, b = 13.341Å, c = 4.67Å
β = 105.02°
Ratio:a:b:c = 0.752 : 1 : 0.35
Unit Cell Volume:V 603.8 ų
Z:2
Morphology:Groups of small spherulites (up to 0.5 mm diameter) and rosettes (up to 0.05 mm diameter) of well-shaped tabular crystals.
X-Ray Powder Diffraction:
d-spacingIntensity
6.67 (100)
3.195 (60)
2.948 (70)
2.691 (70)
2.521 (60)
2.408 (60)
Comments:Format: dobs/Å (Iobs/%) (hkl),
from type description

Optical Data of Pakhomovskyite

Type:Biaxial (+)
RI values: nα = 1.581 nβ = 1.600 nγ = 1.631
2V:Measured: 75° to 80°, Calculated: 77°
Maximum Birefringence:δ = 0.050

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:weak, r < v
Pleochroism:Visible
Comments:X = b, Y + c
pale pink on Y to pinkish grey on Z

Chemical Properties of Pakhomovskyite

Formula:
Co
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
Essential elements:Co, H, O, P
All elements listed in formula:Co, H, O, P
Analytical Data:Results from electron microprobe analysis, water determined by Penfield's method
The empirical formula was calculated on the basis of 5 atoms and ions, respectively, of Co, Mg, Mn, Ni, Fe and P
CoO (34.88)
MgO (2.97)
MnO (2.41)
FeO (0.40)
NiO (0.53)
P2O5 (27.95)
H2O (29.50)

total 98.64 wt. %
Empirical Formula:
(Co
 
2.38
Mg
 
0.38
Mn
 
0.17
Ni
 
0.04
Fe
2+
0.03
)S2.99(PO
 
4
)
 
2.01
 · 8.35H
 
2
O
Common Impurities:Mg,Mn,Ni,Fe

Relationship of Pakhomovskyite to other Species

Member of:Vivianite Group
Other Members of Group:

- +
Annabergite
Ni
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
Arupite
Ni
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
Babánekite
Cu
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
Barićite
(Mg,Fe)
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
Erythrite
Co
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
Hörnesite
Mg
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
Köttigite
Zn
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
Manganohörnesite
(Mn,Mg)
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
Parasymplesite
Fe
2+
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
Vivianite
Fe
2+
3
(PO
 
4
)
 
2
 · 8H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
8.CE.05Chudobaite
(Mg,Zn)
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 10H
 
2
O
8.CE.05Geigerite
Mn
2+
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 10H
 
2
O
8.CE.10Newberyite
Mg(HPO
 
4
) · 3H
 
2
O
8.CE.15Brassite
Mg(HAsO
 
4
) · 4H
 
2
O
8.CE.20Phosphorrösslerite
Mg(HPO
 
4
) · 7H
 
2
O
8.CE.20Rösslerite
Mg(HAsO
 
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
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 8-9H
 
2
O
8.CE.30Ondrušite
CaCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 10H
 
2
O
8.CE.30Veselovskýite
ZnCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 9H
 
2
O
8.CE.30Pradetite
CoCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 9H
 
2
O
8.CE.30Klajite
MnCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 9-10H
 
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
(AsO
 
4
)
 
2
(OH)
 
3
 · 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.45Symplesite
Fe
2+
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.50Cattiite
Mg
 
3
(PO
 
4
)
 
2
 · 22H
 
2
O
8.CE.55Koninckite
Fe
3+
 
PO
 
4
 · 3H
 
2
O
8.CE.60Kaňkite
FeAsO
 
4
 · 3.5H
 
2
O
8.CE.65Steigerite
Al(VO
 
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.75Malhmoodite
FeZr(PO
 
4
)
 
2
 · 4H
 
2
O
8.CE.75Zigrasite
MgZr(PO
 
4
)
 
2
 · 4H
 
2
O
8.CE.75Unnamed (Ca-analogue of Zigrasite)
CaZr[PO
 
4
]
 
2
 · 4H
 
2
O
8.CE.80Santabarbaraite
Fe
3+
3
(PO
 
4
)
 
2
(OH)
 
3
 · 5H
 
2
O
8.CE.85Metaköttigite
(Zn,Fe,Fe)
 
3
(AsO
 
4
)
 
2
 · 8(H
 
2
O,OH)

Other Names for Pakhomovskyite

Synonyms:
IMA2004-021
Other Languages:

Other Information

Fluorescence in UV light:None
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 Pakhomovskyite

Reference List:

- +
Yakovenchuk, V.N., Ivanyuk, G.Yu., Mikhailova, Yu, A., Selivanova, E.A., Krivovichev, S.V. (2006): Pakhomovskyite, Co3(PO4)2·8H2O, a new mineral species from Kovdor, Kola Peninsula, Russia. Canadian Mineralogist 44:117-123

Internet Links for Pakhomovskyite

Search Engines:
  • Look for Pakhomovskyite on Google
  • Look for Pakhomovskyite images on Google
    • External Links:
  • Look for Pakhomovskyite on Webmineral
  • Look for Pakhomovskyite on Athena Mineralogy
  • Look for Pakhomovskyite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
    • Mineral Dealers:
  • webminerals
  • The Arkenstone - Fine Minerals
  • High-end worldwide specimens & outstanding customer service
  • SpiriferMinerals.com - high quality low prices
  • rare and unusual minerals mainly crystallized
  • Search for minerals at Heliodor
  • Find Pakhomovskyite on www.crystalclassics.co.uk
  • Search for Pakhomovskyite on Well-Arranged Molecules
  • Buy minerals from YourMineralCollection
  • Buy RARE Minerals from Rocks of Africa
  • Search for - Pakhomovskyite - on e-Rocks Mineral Sales & Auctions
  • Wilensky Fine Minerals
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Pakhomovskyite

    The 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.
    Hide Locality List
    (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
    		Yakovenchuk, V.N., Ivanyuk, G.Yu., Mikhailova, Yu, A., Selivanova, E.A., Krivovichev, S.V. (2006): Pakhomovskyite, Co3(PO4)2·8H2O, a new mineral species from Kovdor, Kola Peninsula, Russia. Canadian Mineralogist 44:117-123
    Yakovenchuk V N, Ivanyuk G Y, Mikhailova Y A, Selivanova E A, Krivovichev S V (2006) Pakhomovskyite, Co3(PO4)2·8H2O, a new mineral species from Kovdor, Kola Peninsula, Russia, The Canadian Mineralogist 44, 117-123
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: 6th Nov 2012 13:17:46
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds