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wardsci.com 800-962-2660 Montmorillonite (NaCa)0.3 (Al Mg)2 Si4 O10 (OH)2 • nH2O Crystallography: Monoclinic. Always in earthy masses; crystals not distinguishable. Physical Properties: Cleavage: None apparent; usually unctuous and plastic. Hardne...

Chemicals and other sterilization methods can affect the strength flexibility surface appearance color dimensions or weight various plastics differently. These changes can include: Sterilizing your reusable plastic labware Stress on the polymer ch...

+ward’ssciencewardsci.com800-962-2660 Actinolite Ca2 (Mg Fe+2)5 Si8O22(OH)2 (Amphibole Group) Crystallography: Monoclinic; 2/m. Crystals usually prismatic; columnar or fibrous. Also massive or granular. Physical Properties: Cleavage: {110} perfect...

+ward’ssciencewardsci.com800-962-2660 Chalcocite Cu2S Crystallography: Orthorhombic; 2/m2/m2/m (below 105°C); above 105°C hexagonal. Crystals uncommon usually small and tabular with hexagonal outline. More often fine-grained and massive. Physical ...

wardsci.com 800-962-2660 Diamond C Crystallography: Isometric; 4/m32/m. Crystals usually octahedral but can be cubic or dodecahedral; curved faces are frequently observed. Physical Properties: Cleavage: {111} perfect; 4-cleavage directions. Fractu...

Heavy Ice or Heavy Water? Grade 5: Temperature Probe Aligned with National Standards Call WARD’S at 1-800-962-2660 for Technical Assistance Page 2 This is a teacher-led whole class inquiry activity where students observe the effects of temperature...

Almandine Fe3+2 Al2 (SiO4)3 (Garnet Group) Crystallography: Isometric; 4/m32/m. common forms are dodecahedron and trapezohedron. Also massive granular. Physical Properties: Cleavage: Not prominent; {110} parting sometimes distinct. Fracture subcon...

Andradite Ca3Fe2+3 (SiO4)3 (Garnet Group) Crystallography: Isometric; 4/m32/m. Common forms are dodecahedron and trapezohedron often in combination. Also massive granular. Physical Properties: Cleavage: None; parting sometimes distinct. Fracture s...

+ward’ssciencewardsci.com800-962-2660 Galena Pb S Crystallography: Isometric; 4/m32/m. Commonly cubic sometimes truncated by the octahedron; rarely decahedral and trisoctahedral. Also massive granular. Physical Properties: Cleavage: {001} perfect....

+ward’ssciencewardsci.com800-962-2660 Anorthoclase (Na K) AlSi3 O8 (Feldspar Group) Crystallography: Triclinic; 1. Twinning common. Physical Properties: Cleavage: Principle cleavage at right angles or very close to 90°. Fracture uneven; brittle. H...

wardsci.com 800-962-2660 Limonite FeO • OH • nH2O Crystallography: Not crystallized a mineral colloid. Usually stalactitic botryoidal or mammillary; also fibrous massive earthy. Physical Properties: Cleavage: None apparent. Hardness: 5.0-5.5. Spec...

+ward’ssciencewardsci.com800-962-2660 Biotite K (Mg Fe+2)3 (Al Fe+3) Si3 O10 (OHF)2 (Mica Group) Crystallography: Monoclinic; 2/m. Usually in irregular foliated masses and rarely in tabular or short prismatic crystals. Physical Properties: Cleavag...

ward’s sciencewardsci.com800-962-2660 Graphite C Crystallography: Hexagonal; 6/m2/m2/m. Usually in foliated or scaly masses but may be radiated or granular. Crystals tabular of hexagonal outline with prominent basal plane. Physical Properties: Cle...

+ward’ssciencewardsci.com800-962-2660 Sodalite Na8 Al6 Si6 O24 Cl2 Crystallography: Isometric; 43m. Crystals rare usually dodecahedrons. More commonly massive granular. Physical Properties: Cleavage: {011} poor. Fracture conchoidal to uneven; brit...

+ward’ssciencewardsci.com800-962-2660 Azurite Cu3 (CO3)2 (OH)2 Crystallography: Monoclinic; 2/m. Habit varies; crystals commonly complex and malformed. Also massive. Physical Properties: Cleavage: {011} perfect {100} fair. Fracture conchoidal brit...

+ward’ssciencewardsci.com800-962-2660 Magnetite Fe+2Fe2+3O4 (Spinel Group) Crystallography: Isometric; 4/m32/m. Frequently in octahedral crystals; rarely dodecahedral. Commonly coarse-to fine-grained granular massive. Physical Properties: Cleavage...