Pedrizite Root Name Group
A group of related mineral species
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About Pedrizite Root Name Group
Formula:
ALi2(LiZ2+2Z3+2)(Si8O22)(OH,F,Cl)2
The pedrizite minerals are lithium amphiboles defined with:
A(Na+K+2Ca)> 0.5 apfu and
ZLi > 0,5 apfu
Note that the distribution of Z2+ and Z3+ (= IMA C2+ and C3+) is not a part of the definiion of the group.
The individual members of the group are identified based on the dominant elements in the A, Z2+, Z3+ and W positions.
The root-name mineral, pedrizite are defined with Na, Mg, Al and (OH) as the dominant elements. Minerals with other dominant elements are named with pre-fixes in accordance with the guidelines establised in the 2012 amphibole nomenclature.
On mindat.org we avoid using variables with the same symbol as elements and deviate from the IMA nomenclaure in that we use X rather than B, Z rather than C and (OH,F,Cl,O) rather than W.
A(Na+K+2Ca)> 0.5 apfu and
ZLi > 0,5 apfu
Note that the distribution of Z2+ and Z3+ (= IMA C2+ and C3+) is not a part of the definiion of the group.
The individual members of the group are identified based on the dominant elements in the A, Z2+, Z3+ and W positions.
The root-name mineral, pedrizite are defined with Na, Mg, Al and (OH) as the dominant elements. Minerals with other dominant elements are named with pre-fixes in accordance with the guidelines establised in the 2012 amphibole nomenclature.
On mindat.org we avoid using variables with the same symbol as elements and deviate from the IMA nomenclaure in that we use X rather than B, Z rather than C and (OH,F,Cl,O) rather than W.
Name:
The Pedrizite group are named after the type locality of the group,the episyenites in the Pedriza Massif, Sierra de Guadarrama, Spain.
This page provides mineralogical data about Pedrizite Root Name Group.
Unique Identifiers
Mindat ID:
43514
Long-form identifier:
mindat:1:1:43514:1
GUID
(UUID V4):
(UUID V4):
f561f8c4-7022-4f98-97b1-12991ca87609
Chemistry of Pedrizite Root Name Group
Mindat Formula:
ALi2(LiZ2+2Z3+2)(Si8O22)(OH,F,Cl)2
The pedrizite minerals are lithium amphiboles defined with:
A(Na+K+2Ca)> 0.5 apfu and
ZLi > 0,5 apfu
Note that the distribution of Z2+ and Z3+ (= IMA C2+ and C3+) is not a part of the definiion of the group.
The individual members of the group are identified based on the dominant elements in the A, Z2+, Z3+ and W positions.
The root-name mineral, pedrizite are defined with Na, Mg, Al and (OH) as the dominant elements. Minerals with other dominant elements are named with pre-fixes in accordance with the guidelines establised in the 2012 amphibole nomenclature.
On mindat.org we avoid using variables with the same symbol as elements and deviate from the IMA nomenclaure in that we use X rather than B, Z rather than C and (OH,F,Cl,O) rather than W.
The pedrizite minerals are lithium amphiboles defined with:
A(Na+K+2Ca)> 0.5 apfu and
ZLi > 0,5 apfu
Note that the distribution of Z2+ and Z3+ (= IMA C2+ and C3+) is not a part of the definiion of the group.
The individual members of the group are identified based on the dominant elements in the A, Z2+, Z3+ and W positions.
The root-name mineral, pedrizite are defined with Na, Mg, Al and (OH) as the dominant elements. Minerals with other dominant elements are named with pre-fixes in accordance with the guidelines establised in the 2012 amphibole nomenclature.
On mindat.org we avoid using variables with the same symbol as elements and deviate from the IMA nomenclaure in that we use X rather than B, Z rather than C and (OH,F,Cl,O) rather than W.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005890 | Ferro-ferri-pedrizite | Oberti R, Camara F, Caballero J M, Ottolini L (2003) Sodic-ferri-ferropedrizite and ferri-clinoferroholmquistite: mineral data and degree of order of the A-site cations in Li-rich amphiboles Sequence number in the CNR-IGG database: SEQ 1039 The Canadian Mineralogist 41 1345-1354 |  | 2003 | 0 | 293 |
CIF Raw Data - click here to close
Relationship of Pedrizite Root Name Group to other Species
Other Members of this group:
| Clino-holmquistite Root Name Group | â—»{Li2}{Z2+3Z3+2}(Si8O22)(OH,F,Cl)2 | Mon. |
| Holmquistite Root Name Group | â—»{Li2}{Z2+3Z3+2}(Si8O22)(OH)2 | Orth. |
Group Members:
| Ferri-pedrizite | [Na][Li2][Mg2Fe3+2Li]Si8O22(OH)2 | Mon. |
| Ferro-ferri-pedrizite | [Na][Li2][Fe2+2Fe3+2Li]Si8O22(OH)2 | Mon. 2/m : B2/m |
| Ferro-fluoro-pedrizite | Na(Li2)(Fe2+2Al2Li)[Si8O22]F2 | Mon. 2/m : B2/m |
| Ferro-pedrizite | NaLi2(Fe2+2Al2Li)Si8O22(OH)2 | Mon. 2/m : B2/m |
| Fluoro-pedrizite | NaLi2(Mg2Al2Li)(Si8O22)F2 | Mon. 2/m : B2/m |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Pedrizite Root Name Group
mindat.org URL:
https://www.mindat.org/min-43514.html
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