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Mccrillisite

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Formula:
NaCs(Be,Li)Zr
 
2
(PO
 
4
)
 
4
· 1-2H
 
2
O
System:TetragonalLustre:Vitreous
Hardness:
Member of:Gainesite Group
Name:In honor of the late Dean McCrillis and his son, Philip.
This page provides mineralogical data about Mccrillisite.

Classification of Mccrillisite

IMA status:Approved
Strunz 8th edition ID:7/C.02-35
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:40.5.4.2

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
5 : AXO4·xH2O
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Type Occurrence of Mccrillisite

Type Locality:Mount Mica Quarry, Paris, Oxford Co., Maine, USA
Year of Discovery:1994

Physical Properties of Mccrillisite

Lustre:Vitreous
Hardness (Mohs):

Crystallography of Mccrillisite

Crystal System:Tetragonal
Cell Parameters:a = 6.57Å, c = 17.28Å
Ratio:a:c = 1 : 2.63
Unit Cell Volume:V 745.89 ų (Calculated from Unit Cell)

Optical Data of Mccrillisite

Type:Uniaxial (+)
RI values: nω = 1.634 nε = 1.645
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

Chemical Properties of Mccrillisite

Formula:
NaCs(Be,Li)Zr
 
2
(PO
 
4
)
 
4
· 1-2H
 
2
O
Essential elements:Be, Cs, H, Na, O, P, Zr
All elements listed in formula:Be, Cs, H, Li, Na, O, P, Zr
Common Impurities:Al,Ca,Mg,Mn,Fe,Sr,K,Zn,Hf,Rb,F

Relationship of Mccrillisite to other Species

Member of:Gainesite Group
Other Members of Group:

- +
Gainesite
Na(Na,K)(Be,Li)Zr
 
2
(PO
 
4
)
 
4
· 1.5-2H
 
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.20Gainesite
Na(Na,K)(Be,Li)Zr
 
2
(PO
 
4
)
 
4
· 1.5-2H
 
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.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

Other Names for Mccrillisite

Synonyms:
IMA1991-023
Other Languages:
German:Mccrillisit
Spanish:Mccrillisita

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 Mccrillisite

Reference List:

- +
New Minerals (1997), New Minerals 1990-1994.

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 Mccrillisite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mccrillisite details from Handbook of Mineralogy (PDF)
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  • Localities for Mccrillisite

    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.
        • Paris
    Can.Min.(1994) 32, 839-842 King, V. T. and Foord, E. E., 1994, Mineralogy of Maine, Descriptive Mineralogy, volume 1, Maine Geological Survey, Augusta, Maine, USA, pp. 418 + 88 plates.
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. 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.
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