Mindat Logo

Gainesite

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



Formula:
Na(Na,K)(Be,Li)Zr
 
2
(PO
 
4
)
 
4
· 1.5-2H
 
2
O
System:TetragonalColour:Lavender to pale purple
Hardness:4
Member of:Gainesite Group
Name:
Named in 1983 by Paul Brian Moore, Takaharu Araki, Ian M. Steele., George H. Swihart and Anthony Robert Kampf in honor of the US American Richard Venable Gaines [January 25, 1917 Poughkeepsie, New York, USA - January 21, 1994 Earlysville, Virginia, USA], economic geologist with Cabot Minerals and others, mineralogist, and collector of pegmatite, especially Be minerals. He was also an expert in tellurium minerals and named a number of mineral species. He was senior author of the 8th edition of Dana's System of Mineralogy.


Minute steeply pyramidal, pale lilac to slightly blue purple crystals usually about 0.1-0.2 mm.

Classification of Gainesite

IMA status:Approved 1978
Strunz 8th edition ID:7/C.02-20
Nickel-Strunz 10th (pending) edition ID:8.CA.20

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
A : With small and large/medium cations
Dana 8th edition ID:40.5.4.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
5 : AXO4·xH2O
Hey's CIM Ref.:19.3.11

19 : Phosphates
3 : Phosphates of Be and Mg
mindat.org URL:http://www.mindat.org/min-1635.html
Please feel free to link to this page.

Type Occurrence of Gainesite

Type Locality:Nevel Quarry (Twin tunnels; United Feldspar Quarry), Newry, Oxford Co., Maine, USA
Place of Conservation of Type Material:Smithsonian Institution
Year of Discovery:1941
Geological Setting of type material:Late stage granite pegmatite mineralization.
Associated Minerals at type locality:
EosphoriteCleavelandite

Physical Properties of Gainesite

Lustre:Sub-Adamantine, Vitreous
Diaphaneity (Transparency):Transparent
Comment:Very bright
Colour:Lavender to pale purple
Comment:Not a blue mineral.
Streak:white
Hardness (Mohs):4
Tenacity:Brittle
Cleavage:None Observed
Fracture:Irregular/Uneven, Sub-Conchoidal
Density (measured):2.94 g/cm3
Density (calculated):2.84 g/cm3

Crystallography of Gainesite

Crystal System:Tetragonal
Class (H-M):4mm - Ditetragonal Pyramidal
Space Group:I41md
Cell Parameters:a = 6.567Å, c = 17.119Å
Ratio:a:c = 1 : 2.607
Unit Cell Volume:V 738.27 ų (Calculated from Unit Cell)
Z:2
Morphology:{111}, {001}
X-Ray Powder Diffraction:
d-spacingIntensity
6.07 (100)
4.24 (30)
3.27 (90)
3.02 (50)
2.88 (40)
2.17 (30)
2.01 (30)
1.673 (30)
Comments:35-604

Optical Data of Gainesite

Type:Uniaxial (+)
RI values: nω = 1.618 nε = 1.630
Birefringence:0.045
Maximum Birefringence:δ = 0.012

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

Chemical Properties of Gainesite

Formula:
Na(Na,K)(Be,Li)Zr
 
2
(PO
 
4
)
 
4
· 1.5-2H
 
2
O
Simplified for copy/paste:Na(Na,K)(Be,Li)Zr2(PO4)4·1.5-2H2O
Essential elements:Be, H, Na, O, P, Zr
All elements listed in formula:Be, H, K, Li, Na, O, P, Zr

Relationship of Gainesite to other Species

Member of:Gainesite Group
Other Members of Group:

- +
Mccrillisite
NaCs(Be,Li)Zr
 
2
(PO
 
4
)
 
4
· 1-2H
 
2
O
Selwynite
NaK(Be,Al)Zr
 
2
(PO
 
4
)
 
4
· 2H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
8.CA.05Fransoletite
Ca
 
3
Be
 
2
(PO
 
4
)
 
2
(HPO
 
4
)
 
2
· 4H
 
2
O
8.CA.05Parafransoletite
Ca
 
3
Be
 
2
(PO
 
4
)
 
2
(HPO
 
4
)
 
2
· 4H
 
2
O
8.CA.10Ehrleite
Ca
 
4
Be
 
3
Zn
 
2
(PO
 
4
)
 
6
· 9H
 
2
O
8.CA.15Faheyite
(Mn,Mg,Na)Be
 
2
Fe
 
2
(PO
 
4
)
 
4
· 6H
 
2
O
8.CA.20Mccrillisite
NaCs(Be,Li)Zr
 
2
(PO
 
4
)
 
4
· 1-2H
 
2
O
8.CA.20Selwynite
NaK(Be,Al)Zr
 
2
(PO
 
4
)
 
4
· 2H
 
2
O
8.CA.25Pahasapaite
Li
 
8
(Ca,Li,K)
 
10.5
Be
 
24
(PO
 
4
)
 
24
· 38H
 
2
O
8.CA.30Hopeite
Zn
 
3
(PO
 
4
)
 
2
· 4H
 
2
O
8.CA.30Arsenohopeite
Zn
 
3
(AsO
 
4
)
 
2
· 4H
 
2
O
8.CA.35Warikahnite
Zn
 
3
(AsO
 
4
)
 
2
· 2H
 
2
O
8.CA.40Phosphophyllite
Zn
 
2
Fe(PO
 
4
)
 
2
· 4H
 
2
O
8.CA.45Parascholzite
CaZn
 
2
(PO
 
4
)
 
2
· 2H
 
2
O
8.CA.45Scholzite
CaZn
 
2
(PO
 
4
)
 
2
· 2H
 
2
O
8.CA.50Keyite
Cu
2+
3
Zn
 
4
Cd
 
2
(AsO
 
4
)
 
6
· 2H
 
2
O
8.CA.55Pushcharovskite
K
 
0.6
Cu
 
18
(AsO
 
4
)(HAsO
 
4
)
 
10
(H
 
2
AsO
 
4
)
 
4
(OH)
 
9.6
·18.6H
 
2
O
8.CA.60Prosperite
CaZn
 
2
(AsO
 
4
)(HAsO
 
4
)(OH)
8.CA.65Gengenbachite
KFe
3+
3
(HPO
 
4
)
 
4
(H
 
2
PO
 
4
)
 
2
· 6H
 
2
O
8.CA.70Parahopeite
Zn
 
3
(PO
 
4
)
 
2
· 4H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
19.3.1Moraesite
Be
 
2
(PO
 
4
)(OH) · 4H
 
2
O
19.3.2Beryllonite
NaBePO
 
4
19.3.3Hurlbutite
CaBe
 
2
(PO
 
4
)
 
2
19.3.4Hydroxylherderite
CaBe(PO
 
4
)(OH,F)
19.3.5Glucine
CaBe
 
4
(PO
 
4
)
 
2
(OH)
 
4
· 0.5H
 
2
O
19.3.6Fransoletite
Ca
 
3
Be
 
2
(PO
 
4
)
 
2
(HPO
 
4
)
 
2
· 4H
 
2
O
19.3.7Uralolite
Ca
 
2
Be
 
4
(PO
 
4
)
 
3
(OH)
 
3
· 5H
 
2
O
19.3.9Pahasapaite
Li
 
8
(Ca,Li,K)
 
10.5
Be
 
24
(PO
 
4
)
 
24
· 38H
 
2
O
19.3.10Tiptopite
K
 
2
(Na,Ca)
 
2
Li
 
3
Be
 
6
(PO
 
4
)
 
6
(OH)
 
2
· H
 
2
O
19.3.12Roscherite
Ca
 
2
Mn
2+
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
19.3.13Faheyite
(Mn,Mg,Na)Be
 
2
Fe
 
2
(PO
 
4
)
 
4
· 6H
 
2
O
19.3.14Farringtonite
Mg
 
3
(PO
 
4
)
 
2
19.3.15Holtedahlite
Mg
 
2
(PO
 
4
)(OH)
19.3.16Althausite
Mg
 
2
(PO
 
4
)(OH,F)
19.3.17Newberyite
Mg(HPO
 
4
) · 3H
 
2
O
19.3.18Phosphorrösslerite
Mg(HPO
 
4
) · 7H
 
2
O
19.3.19Bobierrite
Mg
 
3
(PO
 
4
)
 
2
· 8H
 
2
O
19.3.20Barićite
(Mg,Fe)
 
3
(PO
 
4
)
 
2
· 8H
 
2
O
19.3.21Panethite
(Na,Ca)
 
2
(Mg,Fe
2+
 
)
 
2
(PO
 
4
)
 
2
19.3.22Dittmarite
(NH
 
4
)Mg(PO
 
4
) · H
 
2
O
19.3.23Struvite
(NH
 
4
)Mg(PO
 
4
) · 6H
 
2
O
19.3.24Hannayite
(NH
 
4
)
 
2
Mg
 
3
H
 
4
(PO
 
4
)
 
4
· 8H
 
2
O

Other Names for Gainesite

Synonyms:
IMA1978-020
Other Languages:
German:Gainesit
Russian:Гайнесит
Spanish:Gainesita

Other Information

Fluorescence in UV light:Not fluorescent
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 Gainesite

Reference List:

- +
Moore, P. B., Araki, T., Steele, I. M., Swihart, G. H. and Kampf, A. R. (1983): Gainesite, sodium zirconium beryllophosphate: a new mineral and its crystal structure. Am. Mineral. 68, 1022-1028.

American Mineralogist: 80: 1074.

Foord, E. E., Brownfield, M. E., Lichte, F. E., Davis, A. M. and Sutley, S. J. (1994): Mccrillisite, NaCs(Be,Li)Zr2(PO4)4.1-2H2O, a new mineral species from Mount Mica, Oxford County, Maine, and new data for gainesite. Can. Mineral. 32, 839-42.

Internet Links for Gainesite

Search Engines:
  • Look for Gainesite on Google
  • Look for Gainesite images on Google
  • External Links:
  • Look for Gainesite on Webmineral
  • Look for Gainesite on Athena Mineralogy
  • Look for Gainesite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mineral Dealers:
  • Fabre Minerals - search for Gainesite specimens
  • Buy minerals from YourMineralCollection
  • Buy from David K Joyce minerals
  • SpiriferMinerals.com - high quality low prices
  • Buy RARE Minerals from Rocks of Africa
  • rare and unusual minerals mainly crystallized
  • Buy rare minerals from Excalibur Minerals
  • The Arkenstone - Fine Minerals
  • Buy from McDougall Minerals
  • Buy fine minerals and gemstones from Pala International
  • Fine minerals from bisbeeborn.com
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Localities for Gainesite

    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.
    (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.
    USA
     
    • Maine
      • Oxford Co.
        • Newry
    Amer.Min.(1983) 68, 1022-1028; "Mineralogy of Maine, Vol. 1" by King, V.T. & Foord, E.E., Maine Geologic Survey, 1994
    Mineral and/or Locality  
    Search Google  
    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands 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: July 7, 2014 00:03:33
    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