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Mccrillisite

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Mount Mica Quarry, Paris, Oxford Co., Maine, USA
© Van King




Formula:
NaCs(Be,Li)Zr
 
2
(PO
 
4
)
 
4
 · 1-2H
 
2
O
System:TetragonalLustre:Vitreous
Hardness:4½
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):4½

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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  • 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.
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    (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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